Why do things end?

Break-ups. They're not the greatest thing to deal with in life. Especially if you're with someone for a long time - lucky for me I've only been with my now ex boyfriend for 3 months. So, the period of time to get over him will be relatively fast. I just wish that the period is over and done with now. I'm tired of these flashbacks of our times together. I want to move on and find someone that can make me happier and that I can be comfortable with. I hate break-ups. My last relationship with Jonathan was easier. I never had these memory flashbacks. I never had this heartache. Was it because Brandon was my first? Emotions are a girl's worst enemy. I dislike it with a passion. I'm tired of thinking about him constantly every day. I want to be able to just focus on me again.