My high school classmates just added me to a chat group. What should I do now?

I didn’t have a happy time at high school. I literally didn’t have any friend in my class the friend I did have turn out to be a toxic person. I was almost like an invisible creature and I was never really included in anything in class. And if I was included, most of the time it was just because I was a member of the class and people just had no choice but to get me in. I was effectively an outsider.

When I got out of high school, I made better friends and found Fluther. That was when I started to change myself and build my current support system. I have been working on putting my past behind and focusing on the people who do care for me.

Fastforward to a few minutes ago. My phone notified me that I was added to a chat group of my high school class. The reason why the group exists is because one classmate is going to get married and she is spreading the news and possibly asking people to attend her wedding. Now this puts me in a very awkward situation. I didn’t have any emotional connection with those people, and I have spent my entire adult life forgetting them. I just don’t want anything to do with them. But it’s someone’s happy day, and I feel so bad for not feeling happy for her. If it wasn’t someone from high school, I would have jumped all in. But it wasn’t the case.

And also they just added me in that chat group, along with everyone in the class, as if they expect me to be involved in their stuff. And they could likely say things about me not caring for old friends, just like back in high school when they thought I was irresponsible. I suspect the reason why I was added was the same as what they did back in high school: because I was a member of the class and not because they liked me.

Not to mention the mere sight of the messages triggered so many bad memories in me, the things that I have tried my best to forget.

I’m sorry that the question is so long, but I just feel so emotional about this whole thing. I haven’t clicked on the messages yet, so they remain unseen in the app. What should my next move be?