You're human, it's normal to feel some benign attraction to other people even when happily married, especially after that honeymoon phase is over. What matters is, if you don't want to cheat, that you don't go further than just a simple attraction.

As for the girl part, I don't understand exactly if you're a woman or a man but if you're a woman, it's fine to not be straight and I don't think you necessarily lost anything if the relationship you're in is good and makes you happy.

Generally, as long as your relationship is satisfying, emotionally and otherwise, and you're happy and love your spouse, feeling a little attraction towards other people isn't a big deal. I guess maybe it would help put you at ease if you took some time to look inside yourself and analyze the relationship you are in, to make sure there isn't something wrong with it you're not admitting to yourself. If you don't come up with anything like that, then I'd say as long as you don't go looking for trouble, it's fine.