<human>: Can you give me the gist of the text in a nutshell?

My (20M) girlfriend (22F) and I are thinking about marriage. I absolutely love her and we fit together so well. Obviously we've had our ups and downs, and I've seen her at her worst and best. I think I'm ready to marry this girl.

However, she is also my first girlfriend. I'd had ample opportunities to date other women before her but never really found them worth the time. I guess you could say they weren't my type. I never really saw myself with a girl long term before her.

I don't particularly care to sleep around with many women and I'm completely in love with this one. However, one of my friends did mention that you should date around before settling down and that you should always leave your first girlfriend. Is it safe to marry even though she's my first and I don't have much dating experience other than her? There would be no other reason for us to break up other than this.

I would love to hear opinions from people who have dated around and people who have married their firsts!
<bot>: Should I not marry my girlfriend because she's my first even though we're completely happy and nothing would make me consider this otherwise?