I was deeply in love, but the other person broke up with me for valid reasons, and then pretended to take me back so they could mentally fuck with me, and it worked.
I'm now a depressive and a semi-hermit. Luckily for me I always liked being alone, or I'd be miserable, but the experience completely changed my personality and I don't get close to people anymore.
Your experience reminds me of my attitude towards friends. I have become a hermit because my trust in other people has been ruined. I don’t even desire having friends anymore.
Same here, and for approximately the same reason (I left her because of the broken trust, she tried to get me back with a plan to fuck with me but I was already too fucked up over it).
It wasn't my final relationship, but I'll die alone and pretty happy. I have a couple of people that I actually trust and, same as you, a butt load of acquaintances that I enjoy being around. I generally use "friend" as shorthand for those people, but they'll never really know me.
I'm very up front about relationships having a shelf life.