Sometimes people will act gay or bi just for attention. Some people do it out of curiosity. That's a stupid reason for them to jump down your throat just because you simply didn't believe her and nothing more. Sounds like something a typical tumblr social justice warrior would do/say (that you're "not tolerant enough") if you ask me.

Also its kinda a big change when we find out a good friend of ours discovers they've come out of the closet. Its a little shocking at first to find out, but you still love them all the same because they're your friend. Its happened to a lot of friends of mine in the past, and I'm sure it will continue to in the future.

But yeah, also don't feel pressured to be one sexuality or the other because people think you're a ***** for being straight or something. I don't think that happened here, but I was just thinking