<human>: Can you condense the text into three sentences or less?

Hey Reddit,

I have nothing to be unhappy about. I'm in a long term relationship (3 years) with a girl I think might be perfect for me. We have a lot of similar interests and life views. We almost never fight. I think I love her (think because I'm having these issues) and I'm pretty sure she's even more crazy about me. We're both 21.

Yet, I feel like I'm missing out. She's my first real girlfriend (had a short relationship in high school, doesn't really count). The problem is that I want to experience more than 1 relationship. I've never had a one night stand or a friend with benefits or dated someone the complete opposite of myself. I keep picturing the single life as lots of one night stands and new girlfriends (even though none of my single friends have this at all).

About a year ago we broke up for about 2 months. I thought I was fine until she hooked up with another guy and it really hurt. I know I care about her a lot. We even have a healthy sex life.

Convince me that I'd ruin my life by throwing this away.
<bot>: In a long term happy relationship, can't stop feeling like I'm missing out. Convince me that she's the best thing that'll ever happen to me.