<human>: Can you provide a brief rundown of the text in within 3 sentences?

So I have been with this girl since my senior year in high school and we've now moved out and are living together. We were so in love but I think now the 'honeymoon' stage is worn off and we aren't all lovey.

There's more fighting and the relationship isn't going all that great. I'm 18 and this is the first serious relationship I've been in. It felt great so I dove in head first. 

Though I think I just wanna be young and dumb and see the world, meet some more girls and have some fun, something I'm not having a lot of with her at the moment.

I'm scared as I have no idea if this is what a relationship should feel like, I don't wanna throw away the best thing I'm gonna get!

She says she wants me to be happy, I want her to be as well. I think she's starting to notice I'm not being fully committed.

So should I move on? Or stay?
<bot>: I'm bored and unhappy, but scared to end my relationship. She might be the one, but at the same time I wanna move on.