Do you know why we have problems?
Because when you got a relationships, you should think not only about yourself and your feelings. When you become two people you should think of two people, not only about how to please yourself.
Oh, and by the way, when you have a girl, i don't think that it's the best idea to tell to everyone you know about what's the crappy girlfriend you have, if you had falling out. Crowd not interesting in this and people always enjoyed troubles of others.
I hope, that you can get it in your 18 years.