SUBREDDIT: r/relationships
TITLE: I [29M] fucked up and broke up with my girlfriend [28F] of 8 years last summer, I really miss her now and want her back.
POST: We were together for 8 years. I met her in college. Some years were great and some years were bad. I broke up with her last summer because we  were arguing a lot and I decided we both deserved better. We had talked about getting married sometimes. I know she wanted to, and I did too, but I for some reason felt like I couldn't commit. 

It hurt for a long time. I thought the hurt would go away. But I still miss her and the more I think about it the more I realize I made a mistake and I think I was just running from commitment. Which sounds ridiculous now because we were together for so long, but I guess I was afraid of feeling trapped.

I have tried dating around. I thought a rebound girlfriend would help me. It did when I was younger. But every girl I'm with now just makes me think how little they are like my ex. And how much I miss her. And even though we fought a lot, how perfect we were. She always put up with me.

We don't talk any more but I know through friends that she misses me. She doesn't have a new boyfriend yet either. Should I try contacting her again? I really can't think of living my life with any other woman but her.

What do I do? If someone has gone through this can you please tell me what to do to fix this?
TL;DR: 
I stupidly broke up with my long term girlfriend of 8 years and I realize what a huge mistake I made and I want her back. I really fucked up and I want to make it up to her and be with her again.