Hey there, welcome to the forum, sometimes we are partially to blame for how people treat us, sometimes not, it's a shark pit out there in the world and those that don't have the social skills to fit in quickly often find themselves as bait.
I don't really have any advise on how to fit in though, I didn't fit in for most of my life and where I did I tried too hard to stay in certain circles, sabotaging anyone that dared called me friend. I've calmed down alot the last few years, taking a more casual approach and it seems to work for me, you just have to find what works for you, I wouldn't try to be something you're not though, I think that's the mistake I made all these years.