Howdy all, so first a bit of backstory - I'll try to keep it short. [editor's note, it's not short... not even close, the first bit is the entire backstory as I think it's important for context so I left it all in, the second bit is the problem that occurred and that I'm having trouble getting past, the last few paragraphs is m feelings right now]

I was dating this girl for about 3 weeks, we were texting daily, seeing each other at school and talking after class every day. We had been on a first date, bowling, and talked after for a few hours, then a few days later I went to walk her into, and out of, Walmart as she felt uncomfortable walking in alone at night - and I lived nearby and loved hanging out with her - we had been dating for about a week. We talked in her car for about 3hr until around 12:30am. We then watched a show in sync together and texted about it as we usually did when she wasn't too tired to not watch it, we called it 'our show'. After about another week I went up to give her a gift I had 3D printed (took 42hr 5min) and she loved it, she said it was the best gift she had ever received, she loves the moon and it was the most detailed moon currently able to be printed, but it was a lamp and lit up so it looked like the moon on the lamp base I bought. We talked in my car until 1:30 am in her work parking lot.

Skip ahead 3 days to that Sunday, just over 3 weeks now and we went on our 2nd official date to a dinner theater to see a musical, 45min drive so the date was about 5hr, nothing special as the food wasn't great and the musical was average, but she said she enjoyed it and we played some games on our phones at the table - well, I taught her how to be better at Blackjack as I introduced her to it and she played some Cards Against Humanity - type game on her own for a while... I sat there and played blackjack on my own.

Anyway, the following night she said she was having a long day, so I wanted to make her a giraffe outline in pink as it's her favorite animal and color and thought it'd be a nice surprise to make her night a little better once she got off work.

Here's where it starts going downhill... quick. She gets off at 11pm, so I parked my car across from hers in the parking lot (there's spaces on each side of a road, cars drive in the middle, there's just spaces on either side of this road) so I parked under a spotlight, across from her car where she said people always park to meet her and where I parked before, there were other cars around too. We were texting, I was seeing how she was doing, we were talking about a her favorite movie that I started watching. Then she had to work over until 1am, so I went home, made a bigger version of the giraffe, went back at 1, she stayed until 2, then she said she had to work until 7 (we had been texting the whole time about the movie and generally talking) so I asked if she was busy and wanted to meet me at the door where employees enter and exit through and that I had a gift for her to help her night, but I wouldn't be up at 7am when she got off to give it to her and that I hoped this wasn't weird. She said it'd be a while and that she had 4 loads of laundry so I just said I'd see her tomorrow at school and that I didn't want to bother her.

I told her how great the movie was and that she was right again, she agreed to both, then I told her to not work too hard, she told me to sleep well... and then I didn't hear from her for 3 days - actually never again.

She wasn't at school because of how little sleep she got, then the other class she normally skipped anyway, but I got no texts, I was getting worried about her and for our relationship, but I just ignored everything and kept on living. On Thursday I get a text from her Ex's brother (she's close with her ex's family - her ex shares the same name as me coincidentally - and still sees his family even though he lives there too) from her phone telling me that I was weird, creepy, never to text her again, ect. How I can't just hang out outside her car and not talk to her and that she had coworkers texting her that someone was creeping outside her car (yet she never said anything about it while we were texting that night...) yadda yadda, I saw that he was misinformed, so I explain what I said here, he gives me props for trying to make her feel better but told me I went about it the wrong way and need to step up my game, he tried to be all big and bad, but ultimately I didn't care about him.

After those texts from her phone I never heard from her again. I see her in class, but I don't speak to her, her body language showed she was uncomfortable sitting near me during something where we sat next to each other recently and she got a pepper spray thing on her key chain after that night.

I know that her talking about her exes so much meant she wasn't really over them (her last 3 cheated on her), and that she obviously has trust issues that would've gotten in the way, and that her communication skills being so lacking and not being able to talk to me about it would've gotten in the way and also the fact she never was interested in me or what I did showed that she was probably just trying to fill the void of her past dates and that loneliness she's feeling.

But I was obsessed with her (in the good, non-creepy way) and I'm having trouble not thinking about her, maybe it was me, ect. and this loneliness I'm feeling and constantly thinking that I won't find someone else, or they won't be as good as her. We had pretty much everything in common and she looked perfect to me and everything that happened almost seemed setup by God. All of this going through my mind has made me feel lonely and made it virtually impossible to get on with my life an forget about all of that. Now, I'm not loathing and lying in bed crying over it, but when I have some thought time to myself I keep finding myself culling over the details and talking myself into a hole and I just don't know how to get past this and shake this feeling and loneliness until I find someone else.
This is the first person to show interest in me genuinely since 8th grade, and I think that had a lot to do with it. I know that I'll find someone else in my mind, but my heart says it's unlikely. I know that if I wait someone will come along (I'm only 18), but my heart says that I don't meet enough people and I'll be too nervousness, ect. (even though I've asked out every girl I've been interested recently in without talking much to them and they both said yes although the girl I asked out recently didn't work out due to her religion).

So I'm in this weird place where my mind knows what's right and will happen, but my heart and body are lonely and telling me the opposite and I just don't know what to do or what I'm really feeling right now, just that I'm lonely and can't get this thing out of my head after almost a month after it's happened now.

Sorry for the essay, but if you read it genuinely thank you and I hope at least one person can give me some insight/help me out here.

EDIT: The main things I keep thinking about are good times we had, things I said, things she said, and just the good times and I'm missing those.