You DON'T have to do anything for them. But if you choose to, be
certain that it makes YOU the stronger person. Speaking from my
experience, if you can find a way of saying NO to social gatherings or
any situation you are uncomfortable with, then do. I know it takes
courage, I'm still only just learning myself. My family don't really
know what happened to me. But they know that something must have
happened to make me the way I am. So they quietly accept me choosing
to do my own thing.
You can do it. And by doing so, you will find the personal freedom
you need to recover, and make your own decisions.
You decide who you are, and what you do. Nobody else should assume
that right.