So long story short on the pre face I was incredibly depressed at this time in my life, I've always struggled with it, but this was a point in my life that, when thinking back, seems like a living hell.
Basically, I had a weird fling with a chick, I was already depressed when it started, so it shouldn't have started, but in the end she used me to get over her ex and then started dating someone else out of the blue and pretended like nothing had happened at all between us.
So this just started an absolute fucking spiral.
My friend wanted to get an apartment at the time, so, figuring maybe just a change in my life and some independence would help, I moved out at the age of 18.
Before we're moved in we're sitting on my front porch at my Dad's, and he asks "Hey man, I know you guys had a thing, but would it be okay if that girl comes over to the apartment sometimes, since she's basically like one of the guys now and all"
I told him no, I'd really rather she didn't, she treated me like shit in that situation etc. etc.
So fast forward, I come home one day and who's sitting there? Yep, her, just on the couch in the living room.
It had been awhile, so, I thought about it, and decided that I do have a lot of mutual friends with this girl, and maybe it was time to bury that hatchet simply to not start drama within the group, she came over with a rather large group of people so it's no big deal.
But then over time, she starts showing up with less people, eventually it's just her, and I'm in my room like holy shit, does this motherfucker, who I've considered my brother since elementary school, who I've loaned money to and always lent an ear when needed, that I would have done anything for, really pulling this shit right now.
So she starts coming over more and more alone in his room, and he's not saying shit to me about it, and I just feel betrayed on so many levels.
He finally told me they were "talking" and I said nothing, I locked myself in my room everyday, I was so depressed that I didn't eat, I dropped to about 130 pounds (I'm 5'10) and drank heavily.
I got out later that year, he still thinks we're cool.