Well, stalking the girl and engaging in scare tacitcs isn't exactly forgetting about her, is it??
Hmm, let's see, I've broken up with plenty of girls in my single days, there must be something I could tell you.
Weed helps. But if you're in school, you may want to lay off of that stuff for a little while. Alcohol to drown your sorrows is never a good idea.
Hooking up with a girl for a one night stand?? Eureka!!!!!!!