Best friend said some pretty hurtful things

Ok, so this kid has been my best friend for over a year. We get along and (usually) support each other through everything, from tiny little bumps to suicidal thoughts. We've literally dragged each other from the edge and are basically siblings.

So, naturally he was the first person I came out too. He was a little shocked, but came to accept it and we got along well. Until lately.
You see, he and I have always kinda butted heads over relationship stuff. He's always been super picky about girls, always super show-offy about them, but hey, nothing wrong with that. Meanwhile, I was still uncertain with my sexuality and never really got around to romance.
Once again, this changed. I got a girlfriend. She's amazing, and naturally I went to him and told him. He reacted... unenthusiastically. So I focused mostly on another best friend, who is much more excited to see me finally getting somewhere.
So, basically, since then he's become really passive aggressive. Once I made a comment about how I need to work on my charming skills, and got met with "yeah, you seem like you'd suck at that". I barely tried to speak to him about it, again because he tends to be immature about relationships.
So, finally I had enough of him only talking to throw in a rude remark. I asked him if I have been bothering him, thinking that maybe he was having a bad day and I didn't notice.
That's when he told me that "I was acting too gay and obsessed over my girlfriend so much that it's basically become my personality"
I was upset, honestly. I broke down and cried a little because he was one of two people that even know about me being lesbian, let alone having a girlfriend. I apologized, but I still feel pretty bad.