AITA- Struggling with my gf

Hi so I posted this in the other AITA group and got deleted so putting it over here! Any advice would be great thanks

I’ve been dating my gf for quite a few months now and it was really good and we both enjoy being together. More recently though things haven’t been so great and it’s getting worse i fear each day. At uni me and her spend lots of time together and do lots of stuff together like going to the cinema or going getting food etc…

Anyway, she’s gone on holiday for 6 weeks and we’ve been calling everyday chatting for a bit when the time difference isn’t so bad. Im going in 2 weeks to go see her, which initially I was very excited but now idk. Over the last week or so I’ve been trying to keep myself busy by seeing friends, either going to the pub, playing golf or meeting one of my close friends and going to the cinema. She got mad at me going to the cinema and getting food with this one friend (who btw she’s never met or ever spoken to). She said it was to do with the fact I was doing “our” thing with someone else and that I’ve replaced her now with him. The day prior to this i went to the pub with work friends and got a little drunk but had a great time having fun. She called me at 3 am to have a chat as she had just woken up and immediately went into a mood when I’d told her what I’ve had to drink and that I was drunk. So at this point she wasn’t very happy with me and after the cinema outing with my mate i got invited to go to the pub again to go see friends who I hadn’t seen in years. As we were driving to town I got a few messages saying how she was upset with me etc and I apologised a few times for being drunk and busy during the day and not being able to call but I would later that night when I got home.

About a hour into the pub she started to spam message me but when I went to read the messages she had deleted them all, so I asked her what’s up, what did she say? I got a message back being told to fuck off and she is disgusted with me. Cutting a long story short she was saying she’s so done with me and that I don’t prioritise her at all, which I feel is unfair because when she was at home before her holiday all I did was spend time with her and not really see anyone else.

An hour goes by and then she starts to spam ring me. She rang me about 20 times, and I told her I couldn’t call as I was out and it wouldn’t be the best time or place but this wasn’t good enough for her and she kept ringing me. All the stuff she was saying was horrible and I honestly wasn’t sure what I’d done wrong. I later found out it was because I hadn’t called her that day even for 10 mins and she annoyed by this

The following morning I finally called her to have a proper chat and she was all lovey with me, being like she used to be and being kind and caring, it confused me a fuck ton as literally a few hours ago she was so angry with me and “done” with me. Was I the asshole in this situation all along ?