What to do with this boy , if he has a girlfriend?

This guy will never by any different. You will contantly be on an emotional rollercoaster. Sure, it's hard "quitting" someone you really want, but you have to be strong and do it. Remember the long run. Do you want to waste anymore time dealing with a flaky guy, or would you rather be a strong female who can be independent and eventually end up with someone worthy of your affection?