<human>: Here's a brief relationship story... 
I fucked up big time. I dumped my girlfriend over a 3 months ago because I felt like I was unhappy with her. Turns out, I was just unhappy with myself and she was the best part of my life. We've been together for 6 years, and next June would have been our 7 year anniversary. I had feelings for someone else within the last year, and I fucked up by constantly seeing that person even though my girlfriend was very understanding of it. She just wanted to get to know her, and would constantly tell me "a crush is a crush" and "a crush is normal as long as you don't do anything inappropriate". She was the most understanding person, and honest to god the nicest girl anyone has ever met. My family loved her and I loved her family. Our parents got along, and we even had the same circle of friends. For the longest time I treated her like shit, and I am so ashamed to admit to it. I would be very mean to her verbally, and I would bring her down constantly because I felt so much better after it. It's a shit thing to do, but I hated myself and I was jealous of her drive. She's not only a beautiful person on the outside, but she was so sweet and caring to me. She would make sure everything was okay with me before she checked in with her self. And I constantly took that for granted. She put up with me even after I cheated on her, and I would constantly lie to her. Sad thing about all of this was she knew I did it and would confront me all the time. While we were together I kept telling myself she was a nag, and she would smother me too much. That I just needed something different in my life... 

I tried dating that girl I liked after my girlfriend and I broke up and things fell through. I would constantly compare her to my girlfriend.

We're friends now, and we still talk often. I know I love her now, and I know how much of her I took advantage of. I made some changes in my life and I won't be that same person.

Give me a shortened version of the text
<bot>: I want my girl back. I fucked up. I realize how much of a terrible mistake I made. What should I do?