I am wary of somehow sounding patronising but I think it's really important to recognise that sexuality is a process and not just a fact, or at least that's how I see it. Things you like or want now may change over the years, and you don't have to just make a decision (any kind of decision, not just regarding gender) now and stick to it. Maybe obvious, but worth saying.

But I think it's good and important to realise that negative feelings are most likely a result of stuff that's happened in the past, and that you can deal with them and heal