As a recent college-grad who'd moved to suburbia, I think the automobile-centric culture in America is what is killing intimacy. If you were not able to make close friends in college/early-life, than once you live on your own in the suburbs, it often feels impossible to get any sense of intimacy. Intimacy is built up with small moments, and when every interaction has to be a commute-laden ordeal, you lose the opportunity for spontaneous and random social interactions, making the process of building of relationships orders of magnitude slower.
Had a somewhat similar experience (except that my (college) friends lived across the Atlantic).
Ideally suburbia should become a thing of the past (and it might, with rising energy prices). But for now I'd say the best thing you could do is move back to the (inner) city (or back to uni for a post-grad).
It may be a hassle but being unhappy is a drain as well.
I can also highly recommend most European/UK cities, as their cores are where people actually live and thrive, rather than that odd mix of blitz corporate office guests and sniffling economic outcasts.
