TLDR
It's really complicated. We were best friends before dating, in the late 90s after my divorce. Then we started dating and we had a lot of great times together but he hurt me very badly in 2002 with the coming-out thing and a lot of other longterm deception. We didn't talk for years after that but he helped me get out of my trauma situation in '09 so we started being friends again, albeit tentatively and platonically. (We were always platonic, but that's another story.) Then we just stayed friends and I kind of rebuilt my trust in him. It's a long story but we own a house together (he pays for it, not me) and I'm still his next-of-kin but we don't talk very often. I haven't seen him in a couple of years and we live very far apart. There's been some bad blood between him and MR because of how he hurt me, but that's pretty much settled down. It's really a mindf**k for a lot of reasons good and bad since he's been a huge part of my life for 30 years and he really doesn't have anyone else to help him. He's going to be 70 in the summer so he's going to need care.
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And in the end, the love you take is equal to the love you make.