when I was younger, I would let girls get to me to the point where I couldn't sleep. I would drive around at all hours of the night. Things are tough sometimes when it comes to women, there's no question about it, but as long as you don't let everything revolve around them you'll be better off. It can be tough, probably the toughest thing you've done. I know the feelings you can get when that certain girl has gotten to you; man it can drive you nuts!
Keep your heads up fellas. All that crap will pass. Redirect your attention else where. hang out with your buddies anything to keep busy. Find your outlet. I don't think drinking and smoking weed is the right approach. Alcohol is a depressant, definately not the answer here.
Good luck guys, and I hope this stuff passes quickly for you.