Came home to my landlord drunk in my living room

I’ve been renting my 2 bedroom house from a private landlord or 9 months now and never had any prior issues until last night (Halloween) I got home around 9:30pm to find my landlord had let himself in, and was laid on my sofa drunk and passed out. It gave me a huge fright because I didn’t recognise him at first, the last time I saw my landlord was my move in day 9 months ago. I just froze and it took me a couple of minutes to realise it’s my landlord. I shook him awake and asked why did he let himself in and what is he doing here. He said it’s his house and WHY AM I THERE. I explained I rent this house from him and that it’s illegal for him to let himself in. Eventually, after a lot of misunderstanding, he sobered up and realised what he had done. Apologised profusely to me and came to the understanding that he got so drunk that he thought he still lived here. (He lived here before renting to me) I feel very violated and uneasy in my own home now because I think what if it happens again and I’m in bed asleep one night and he randomly comes in drunk. He is an otherwise great landlord and it was just a mistake.. but I’m not sure what to do about this and how to get back to feeling comfortable in my home again.