Rule number one: GET OVER YOUR EX. You broke up, period. If you get back together, the same thing will happen. The happily-ever-after story with break-ups only happens in the movies.
Rule number two: GET OVER YOUR ONE-ITIS. This should be self explanatory.
Rule number three: IF YOU WANT TO DO SOMETHING, DO IT NOW. If you want her back, be proactive in doing so. Don't mope around and hope that she comes running back into your arms.
Rule number four: DON'T LET A WOMAN USE YOU. That's what's happening now. Your ex is using you as emotional support and a listening ear for nothing in exchange. She only does it because she knows you are available and easy to manipulate. Wise up and stop being her tool.
-Damian