How to kindly end things with the guy I’m seeing

I (21f) met a guy (23m) a month ago. We’ve gone on a few dates and talk everyday. We have SO much in common. We like the same music, we both like anime and video games. We hit it off. Overall, he is an incredibly sweet guy. Super nerdy.

However, I have the ick now. He’s a total virgin, which is okay. I don’t really mind that he’s a virgin. It’s just how he acts about it, and the way he is. He’s never held hands with girl. So when we held hands he was all giddy. It was kinda cute. Obviously never kissed girl either, I was his first kiss. He froze and wouldn’t make the first kiss. I had to.

The other day I went to his house. We watched TV in his bed and it went well. He asked to feel my boobs since he’s never felt breasts before. I was okay with it. So. He did. He asked to suck on them which I let him. Then he asked to put his face between my breast. I said okay, but it kinda was weird. He then proceeded to violently shake his head between my breasts. It was awkward. He was all excited telling me he’s never been this close with a woman before. That’s as far as it went.

Since then he’s gotten weirder. He now calls me his ‘Chun-Li’ since I’m a brunette with strong/big thighs. He goes on to tell me he likes that I remind him of her… a video game character. He tells me how else I remind him of anime/video game girls. He’s even asked me to dress like one. And now he wants me to call him a ‘good boy’ which isn’t my thing at all. He sends me TikToks of half naked girls in cosplay which I especially don’t like. Which is funny, because he’s told me before he wouldn’t want me to post half naked stuff, yet his following is full of half naked girls.

He’s very insecure. He asks how many boyfriends/hookups I’ve had, if I still talk to them, if I still like them, if they’re better than him. He told me himself that he’s insecure.

He’s already told his friends about me, and he asked me to never drop him. He wants me to stay around. He is incredibly into me. I’m just not feeling it anymore, though. I don’t know how to kindly break it off. I don’t want to hurt his heart. I feel bad.