Mental health support group outings are causing internal issues

I'm not formally diagnosed with anything, but my mental health treating team have mentioned schizophrenia.

I am apart of a youth mental health support group, I think they help with psychosocial things or whatever they are called, have been for 3 years. Recently (late May) they decided to have group outings.

These groups are causing a literal moral dilemma for myself, I have issues with interacting with others, I feel its immoral/unhealthy to do so. Recently these feelings have become "fact" in my own head, so instead of it FEELING like its immoral/unhealthy, it becomes a law of the "being" in some sense, I acknowledge that it's not like that for other people, but for some reason that's how it is for me.

Going to these groups is like watching a beloved animal die and choosing not to do anything about it. It's really dragging me down. Everyone I've told about my dislike for these groups just says, "You'll get used to it : < )" or "Interacting with people is good for you : > )".

I want to go to these groups, because I've never had friends in my 24 years of life, but the feeling/line of thinking is disparaging, mainly because no one knows what it is ,what is causing it or if anything can be done realistically. To top it off, there is this person I'd like to be friends with but I don't know how to navigate feeling/thinking like this and actually being a person that is considered "beneficial" (I don't know what other word to use?) to another person. I've had people that liked me in highschool and we'd occasionally play PC games with eachother but I didn't interact with them all that much because of these feelings and I proceeded to ghost them as soon as school finished for good, and I feel really bad about doing that, but I saw no other way of staying sane.

The feeling/line of thinking is vague but it causes lots of discomfort. And it's getting worse. Everyone says that the groups are a good thing, but my "truth" says otherwise...