I tend to avoid stuff a lot. Unless whatever it was is absolutely mandatory, I'll either skip it (family get together, work dinner/party etc) or put it off till next week (church, appointments, etc) and so I generally never do those either. Sometimes someone wants me to go and I really don't have any way to get out and end up going (like my aunts wedding... which was absolutely horrible for me since we were LATE and I didn't wanna go in the first place... one of the worst days of my life. I felt bad though cause I was obviously NOT enjoying the occasion and most people could tell, I felt so miserable)
I really hate the work dinners cause then you have EVERYONE asking where you were or what you were doing or whatever. And yes I just start making up whatever reason I can think of for why I didn't show up.