How can I tell what gender I prefer?

If you mean the gender you would want for your partner: Then the easy answer is, unless you see yourself only being happy with one or the other, it doesn't matter and what's important is finding someone who makes you happy :)

I am gay and have always felt different. The older I got the clearer it became. What gender you prefer is about how you feel when you look at someone. With some you may find an admiration/attraction that is stronger than with others. Maybe it's men, maybe women or maybe just people in general. I always say that sexuality is fluent. Go for what you feel like going for and then maybe later you will feel like labelling it. Maybe you won't and that's okay too. All that matters, in my opinion, is that you are comfortable with wherever your interests takes you.

You don't have to be afraid, you can tell it when you meet a new person or just correct someone that doesn't use the correct pronoum !

You can tell my reflecting inside yourself and asking yourself who you are and who you like. You may not prefer a gender though. Some people like all genders or some genders. Those are valid orientations :)

You have to identify which gender causes you to have more of an attraction factor to. Take your time on this as this is not an easy process and a process that you should not rush into.

Ask yourself this; Do you feel like a female? Or a male? Perhaps none? It might take some time to figure out. Good luck :)

Gender I feel is a hugely personal issue that only you can know or find the answer, Although it is also important to feel that your not facing these issues alone! Is there someone that you feel that you can trust to share this with or have you thought about gaining some support from a counsellor with this issue?

Experiment with it. See which you like more. Maybe you aren't tied down to one favorite. One gender may do something you like more than another

If you find a gender you enjoy and want to be than you can be that gender. If you dont find a gender you enjoy and like your own the most then you can be your gender.