Hello Thek24: I see this is your first post here on PC. So... welcome to Psych Central. Based on what you wrote, it doesn't sound to me like you are gay or bisexual. It sounds to me as though this is simply a worry that has gotten stuck in your mind & that you can't get rid of. It's like the old saying about whatever you do don't think about pink elephants & then all you can do is to think about pink elephants! However if the possibility of being gay or bisexual is something that is of concern to you, & you just can't seem to let it go, perhaps the thing to do is to delve into it with the assistance of a counselor or mental health therapist of some sort?

Here are links to 2 articles, from Psych Central's archives on how to let go of intrusive or just plain stuck thoughts:

How You Can Overcome Intrusive Thoughts | Dialectical Behavior Therapy Understood

9 Ways to Let Go of Stuck Thoughts

I hope you find PC to be of benefit.