My only two friends never responded to my last texts, what do I do?

One friend I knew for a few months and we met up to do things quite a few times. Last time I heard from him he said his band was performing somewhere, I said I’d try to attend if I could get my other friend to go with me since I’m bad at social stuff like that. My other friend was unable to go so I messaged him and said I’m sorry I can’t go to the thing and asked if he’s available to meet up any time soon, which he never responded to (this was back in September).

My other friend, who I’ve known for about 3 years, invited me to her party back in October. I went and I think it went well(?) even though I was the only person there who wasn’t drinking. I had to leave early (I wasn’t the first person to leave, I think maybe the second) so I said bye to everyone and left. I then sent her a message and said I had fun and I’m sorry if I was socially awkward at all and that I’d be happy to go to anything else she’s doing. She never replied.

I spoke to my PA about this and he thinks I might have done something at the party that made her not like me anymore. I can’t think of anything though, I’m the type of person to over-think things and I really don’t think I did anything wrong. The only possible thing I could think of was that one of her friends (who was 17) was really drunk and was hugging me a lot and I just kind of let her because IDK what I’m meant to do in that situation. Is that bad? Other than that I can’t imagine anything I could have messed up.

It’s been 3 months since I’ve had any social interaction at all and I’m kind of going insane. I’ve been to a ton of different places in that time but am completely unable to find anyone I can socialise with. I’m not sure what I should do. Is it bad to message people again if they didn’t respond to me last time? I feel like I’m not meant to do that but IDK what else I can do.