Yearning

So first time posting something on here(yay). so uhm yea, I’m the type to be head over heels in love with anybody I’m in a romantic relationship with. But then i constantly find myself fantasizing about other girls, is that normal? I know it’s normal to give your heart to one person and still find people attractive, but mine’s more like yearning, like i could be in a relationship rn and actually love my the girl im with at that moment but yet still see another hot girl and my mind’s all like ‘damn if I could date her’ which I myself think is really weird, because I often feel guilty about it and it makes me feel like I’m cheating somehow. But the thing is I’ve never really been in an actual relationship where we get to call ourselves girlfriends or use any labels so maybe that might be the problem, I don’t feel like I belong to someone so I can do whatever I want, maybe if i actually devote myself to one person and get an actual girlfriend and not a situationship or a fling, that might stop. What do yall think?