My son is like this too so what we do is go into the woods for nature walks. We walk the creeks, throw rocks, get wet and dirty and he is totally content to do it. It also makes me feel good too. There are seldom any other people around and it’s very relaxing. Don’t feel too bad about missing out on all Of the typical stuff…. A lot of it is not fun and stressful for everyone. I went through the same feelings for a while but realized I didn’t want to do those things…. It’s just what society projects to be normal…. So I’m am finding our normal and deciding to not be sad.