whenever i fantasize about men, maybe even just romantically, my mind replaces them with girls :( it doesn't make me super anxious but i want it to stop and then i feel the need to check if i like it and then it goes wrong and i feel like i would enjoy it :(

So I identify as a lesbian and I am in a committed relationship with a wonderful girl. But i’m stressing that I have crushes on boys I go to school with. I get anxious around them, which I think I mistake for excitement. I obsess over it in my head which confuses me a lot. Idk I also never think about them sexually or romantically but I think about them often which is scaring me. Any advice?

Why are things so real the first time they’re in my mind and then when I think about it later it’s easier for me to be like wtf?? I was watching a movie earlier and the young girl had developed more in the chest area than the last movie and I felt the desire to check her out so I did. Then later I let myself imagine her having sex and I liked it. But now looking back I’m like ew. The boys in the movie have also developed as the movie went on and I couldn’t help but think that in their real life they’ve probably woken up to boners and s*men and stuff. And looking back it’s just ugh. Idk if it’s sexual relevance but I genuinely let myself indulge in these thoughts and groinal responses and I remember thinking to myself I don’t want to be attracted to little kids and how do I stop myself (everyone has attractive qualities so in younger boys I see man like qualities). Idk I need help. I wouldn’t type this out if I truly believe I was messed up but I’m still scared

I really dont know if it is ocd anymore I dont want certain sexual things with my bf anymore that i used to like When i envision it with a girl it is so easy to envision and it feels like i want that , that will give me the satisfaction This feeling is making me really question if i am still into men , desire men sexually Is this still ocd , i really dont know anymore , as it is a feeling it is too real