In the broader picture, where most adults are lonely and can't make friends, being negative and focusing on the friendships lost thru community housing seems a bit myopic. If the multitudes of relationships gained aren't worth the ones that are burnt - and I am not minimalizing those that are being burnt - it truely sucks to lose friends - but if, over the years, you haven't managed to gain more friends than you have lost, then something is wrong.
I can't say what, because I don't know you and your circumstances, nor your morals, or lack thereof, but it's Saturday night where I am, and I'm going to go enjoy it with friends that I've been avoiding, in favor of doom scrolling.