*ignoring/bitchy* to a guy

no I seriously doubt it

he might think christ I really pissed this girl off I'd better try to fix this and make her not hate me

or more likely is he'll be like wow what happened to her I can't believe I used to like that girl and then he'll just forget you and move on

Nope if she's acting bitchy or ignoring me then I'd just think she was mad/angry/not interested in me. Sounds like you want a guy you were with before or who may have liked you previously to like you again. I'd suggest be happy and cheerful when you're around him. Don't let on that losing him really hurts Be nice to him but don't let on that you're interested in getting back, he may come around and realize what he's lost. It may work or he may have moved on and found someone else.

Thats a definite no. If she doesn't respect me then I don't need to get involved with her.

That would be a sign to me that the girl is not interested. I wouldn't pursue a girl who did that to me. But I can't speak for every guy out there.

No. he will get mad or what not. some guys might not talk to you for awhile or not at all, or if he cares for you he will come back no matter what. But if you ignore him he will start to think you don't like him anymore etc. It won't make him interested in you again if that's what you are thinking it will just run him away.