I hooked up with my best friend
I'm very shocked right now. Why did you hook up with your best friend?
I've always been a really jealous person and wanted him too
You're free to sleep with whoever you want, however you shouldn't do it because of jealously and if you really like the guy then you should have just said so. Why haven't you told your real feelings to your best friend?
Because I'm a special snowflake.
I feel like you're overcomplicating things instead of just being honest with him. I do suggest that you pursue him if he is interested with you, but respect him if he's already taken or do not see you as a girlfriend material. I strongly suggest that you just don't keep things from him moving forward.