In NYC,I'm constantly surrounded by millions of people. I see more people riding the Subway in one day than live in the entire town I grew up in, but somehow I feel very alone here most of the time.

Maybe it's the busy-ness that exaggerates the feeling. It seems everyone always has somewhere to go or something to do and friends or family to do it with. Sometimes it makes me sad to look in on it and remember that I once had that.
Yes, it's great to live in a city with a million things to do, but it's not that great when you have to do them all by yourself.
I know it takes time. This isn't the first time I've started over. Every time I leave a place I get sad because I realize I am always leaving behind these great lives. Lives that I created in a situation where I once felt this same loneliness.
So I know I need to be patient and maybe I will even surprise myself and find myself crying when I leave this city.