Why do I have anxiety when I imagine myself with girls. I sometimes dont have anxiety with men😭😭😭. I'm straight

I am a 21(female). I have only ever kissed one guy and it was horrible and I cried after. I stress about my sexuality constantly. I only want to be straight and know I want to end up with a man, but picturing it stressed me out and I am so scared to kiss a guy I think about it and get so stressed and cry immediately. I have severe intrusive thoughts about kissing everyone my teachers my best friends and it creeps me out and then I go down a rabbit hole of sexual orientation ocd! If anyone has any tips that might help that would be great. Again I don’t want or think I am gay but being so scared to be intimate with a man starts me down a spiral.

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?

Like I can’t think straight. This is making me doubt everything I’ve thought about myself and even makes me feel like I like the thoughts when I know I don’t. Like I would be less anxious at a time while I still have the thoughts and my mind would go “oh so you like it you must be gay” or the other one where I’m not anxious and I think of my attraction for girls that I’ve had my whole life and my mind goes “see now you’re not into them you’re gay” like it’s so stupid but so effective. I clearly remember being into girls my whole life but my mind is making me believe that all these attractions and feelings for women were all fake or “a thing of the past”. But I can still get aroused by women but I have this weird anxiety going on which brings these sensations/feelings and it’s so weird. Today I’ve spent my whole day thinking about it like I’ve been doing for 5 months now. I know that this aint normal but my mind just won’t let me live in peace. I never cared about my sexuality cuz I simply liked women my whole life but now my sexuality is a fundamental philosophy. I hate this.