<human>: Can you condense the text into a few key points?

I have severe social anxiety. When I met my boyfriend 3 years ago, I was happy to find someone who loved me for who I am. We moved in together a year ago. I haven't spent much time with his family, which I am ok with to an extent. While I want to get to know them, I get really nervous around them. We live in different cities and they rarely come to visit. I visited them at their house last year and had an anxiety attack over it the night before, but it was fine once I got there.  

His mom invited us to a festival at the end of August. It is only about 10 minutes from where we live and since I'm currently unemployed, I feel like I pretty much have to go since I don't have an excuse not to. I am dreading going and I get anxiety every time I think about it. His mom is usually pretty friendly with me, but I find it hard to make conversation and just ending up feeling awkward. Then, afterwards I overthink what I said/didn't say to her. We are also going out for dinner.

I really want to tell my boyfriend I dont want to go. However, I haven't seen his parents in almost a year so I don't want to insult him, and I dont think he would understand how anxious it actually makes me feel. He also has a tendency to skip out on me and spend a ridiculous amount of time in the bathroom when hanging out with his parents. I don't know what I should do in a situation like this. Should I just suck it up and go anyway and hope that it ends up going well?
<bot>: Boyfriends mom invited us to a festival event and dinner at a restaurant and due to my severe social anxiety, I don't want to go. I haven't told my BF yet.