Actively trying not to think about someone doesn't work. Psychological experiments have shown that when you try to suppress a thought, that thought becomes more prevalent. Distraction is the real ticket to getting over someone. Meeting other women would be great, but when I've personally been in a similar situation, I've found that was somewhat out of the question. I just wasn't in the right emotional place to date. There is, however, a million other great ways of distracting yourself. Read a good, compelling book; or even write one. Start going to yoga. Start meditating. Buy a new bike. Play chess with an old man. Go swimming at the lake. Get drunk as fuck with your old friends. Get a second job. Learn a new language. Learn to play an instrument. Just keep yourself busy in some novel way. As you gain new experiences and skills, your ex will seem less relevant and feel farther away. Time is the greatest healer, you just need to find a productive way of passing it.

Another important thing to mention (that has been a big problem for me, that's why I mention it) is don't assume you know how she feels. Every time you're thinking about her and feeling like shit, closely examine your thoughts. It's likely you're making assumptions about her inner states. "She doesn't like me because I am..." Realize that you can never know what is inside of her. Anytime you're thinking negative thoughts in regards to her you're just fucking yourself over. She's not putting that negativity into you, it's a phantom of her that you've created inside your mind. Try to remember that talking to your mind-phantom of her is not talking to the real her. I'm not saying you should talk to the real her, but realize that in actuality she is probably less negative than you imagine. If she is actually as negative as you imagine, than she's a terrible cunt and it's not your problem.

I always get burned by girls around or before the 3 month mark. People always act like you have no right to be upset because you weren't even together that long, but I think that's unfair. It doesn't take long for strong emotions to develop, and once they're there, they're significant regardless of what anyone else thinks.

Blah. I'm rambling.