<human>: I have been dating my boyfriend exclusively for 3 months. I have met his parents and his brother 4 times so far. I haven't interacted much with his dad and his brother, but they have been very nice to me. I spent more time with his mom and we really get along. 

My boyfriend's parents are having a party today (no special occasion really, just a final get together this summer). I have been diagnosed with depression and anxiety and I am currently in therapy for it. My boyfriend is understanding and doesn't give me a hard time, he always asks me if I'm OK when we're out with his friends as he knows social situations with people I'm not very familiar with make me really anxious. 

I have known about this party for about a week and I thought I could handle it. I am terrified of making a bad impression with his extended family (like I said, I am therapy and it has been helpful, but I still get panicky in some social situations). The party starts in a couple of hours and I am on the verge of a panic attack. 

Please give me some pointers. Dos and Don'ts. What topics should I talk about with his family? I've been spending the morning reading up on local news and local events in my town, so that should give me something to talk about with them. What more can I do?

Can you succinctly summarize the text in 1-3 sentences?
<bot>: I have social anxiety and I am currently in therapy for it. My boyfriend of 3 months invited me to a party with his family at their house where most of guests are his extended family. Help me make a good impression.