There are a lot of people who feel the same way as you do. Here's a simple solution. Sublet an apartment in NYC for a month. See how you feel.

People debate if Boston is racist. I'll stay out of that conversation. But I will say that lots of people in Boston aren't used to having friends outside of their social demographics. This is really important because if you're a foreigner or just different .. you won't find that many people inviting you to get closer. It doesn't mean they're bad people or racist. They just never spent time around people different than them.