I don't want to go to family gatherings with my so
Why didn't you want to go?
I find them really boring.
You should always be there for family. Even if they are boring, you should be there for your SO.
I'm not that close to them.
Well if you think about it from a different perspective you are there because you love your partner. You guys could have a good time and enjoy each others company even if you don't like other people there.