<human>: Summarize the given text in a few sentences.

We've been dating two years. This would originally happen mostly after we just had a fight, but lately it has been more frequent.

I love my girlfriend and am very emotionally involved with her. At the same time, I get pleasure out of imagining what it would be like to be single again.

I might speak with a girl in class, for example, and imagine that if I were single I would try to ask her out. I don't mean flirting, and certainly not cheating on my girlfriend. 

I just imagine a fantasy world where we aren't together, and think of the freedom I would have, the lack of someone to be accountable to.

Sometimes it is about the prospect of sex with someone else, but other times just more generic freedoms like not having to attend her family functions or whatever.

Is this a natural way of dealing with monogamy and nothing but a healthy fantasy, or a sign I should break up with her?
<bot>: I love my gf but I like to fantasize about being single and doing whatever and whoever I want. Am I experiencing natural cravings or does this mean I'm not actually in love with her?