Is it weird to have an open relationship?

If both of you are on board I think its awesome to try it out.

That's code for she isn't satisfied with seeing just you...and at your age, there is nothing wrong with that. See other people. Remain friends. Explore all of your possibilities...and don't commit yet...you are just too young.

Ive always had the "fantasy" of my woman sleeping around when ive have a gf but like i would never do it in real life.. Word to the wise YOU PLAY WITH FIRE YOU GET BURNED.. Good luck..

That means she has already cheated on you.

I believe it is right for some people.

My wife has a boyfriend and I'm ok with it.

It would be to me. But you do you.

Would you be ok with her having sex with another boy?

Its up to you but it dosent align with my personal comfort level and belief system.
Even if I could suspend my moral code for a moment and imagine it I still would not do well in it because I want my partner to myself.
What if I've had a very bad day and want his support but he is busy that night banging his other woman.
What if she confides in the other guy about your sex life?
What is that other person exposed you to STDs?
What if her feelings become much stronger with him?
Consider it all.

Not if that is what you like or require. For some its perfectly normal.

I wouldn't, but that's just me

Great way to break up