I feel like I might be missing out

Hey everyone!

I just want to say off the bat that I love my boyfriend. He adores me and as much as he is shy he does show it. I'm turning 21 in a month and it's got me constantly anxious about where my life is going.

I've been in a relationship a year and a half now and as much as I love the comfort I feel like I might be missing out. You're only young once and what if I spend my 20s in this relationship and I regret it?

When I was on my year abroad in France last year a few guys kept trying to get with me and twice I let them kiss me but nothing more. I'm glad I stayed faithful because I know you can never take it back but also... what if i threw away my chance to experiment?

A part of me is constantly thinking about that ugly word "regret" but the other is telling me that I'm so lucky to be in this loving secure relationship.

Have any of you guys been through something like this?

Thanks everyone!