I (romantically) love my only friend (he doesn't reciprocate) but in general he's kind of an asshole that only cares about himself.

I recently told him about a major life regret that directly relates to my current mental problems and he responded "regret is a ridiculous emotion since the past cannot be changed".

He's autistic (as am I), but that's just too far. It's fucking obvious that that's a shitty thing to say but he doesn't really care.

I hate him half the time and would be much better off not in love with him but it just won't go away.