This is probably one of the stupidest posts on here but hear me out.

So I have this "friend" (let's call her A) and she constantly complains to me about how everyone likes her, or lists all the people who supposedly do - which, I'm 95% sure they don't, some of them even have girlfriends that are our friends -, or tells me things like "omg my boyfriend just sent me another like 10 paragraphs" and screenshots them all to me. To make matters worse, a guy who I had sort of a history with and now passionately hate, APPARENTLY likes her. I know for a fact that he doesn't, she used to like him while I still did and he was not interested in the slightest. A also casually brings this up even though she knows how upset I get whenever I hear even his name. But she has this idea in her head that every boy that talks to her has a crush on her. That's not how the world works.

I'm seriously considering, however, that I'm the real asshole. Mainly because I was talking to one of our mutual friends who I actually trust, and sent some screenshots of our chats while blocking the name out. I made sure she knew that I wasn't there to talk bad about A because she's always fun to talk to and (sometimes) there for me, and that she was just currently pissing me off big time and I needed to rant. 

Thoughts? Is she being conceited? Or am I just being a salty asshole that no one likes me and a bitch for talking to my other friend about her? 

(Sorry for probably many grammatical/spelling errors, typing on my phone and can't even be bothered to go back and reread.)