Anxiety and Dating help

So last night for New Years it was only supposed to be Me, my boyfriend - of 3 months, and his best friend at his house. Note: he knows I have anxiety and that I’m Depressed (so when one acts up the other one follows)

His friend found out that there was a party a block away and told us that we had to go say hi.

I didn’t want to go because I get beyond anxious and uncomfortable at parties, but my boyfriend said sure and I just wanted to make him happy so I came along too.

He just said that we’d say hi and leave, but that didn’t really happen. We stayed there for three hours and he kept making excuses to not leave.

I had a really really bad anxiety attack so I left the room for a bit (I kinda expected him to come and check on me cause he saw me leave, but he just continued talking to his friends)

I knew most of the people there - there were 10 other people so it wasn’t huge, but enough to make me anxious - but I didn’t know them well enough to have a conversation with them.

After the anxiety attack I went back, put a smile on my face, sand pretended that I care.

Long story short, when we finally left my boyfriend walked home next to his friend, leaving me to walk behind them, crying and having another anxiety attack.

After I left is house he texted me “I know you feel sorry but don’t be, that stuff happens. I’m just glad that I was there for you”

But he wasn’t really there and I don’t know what to do or say to him... please, does anyone have advice? I really need it. Thank you.