Am I questioning my sexual identity?

Well...the most simplest question to ask yourself is, are you attracted to girls?

I don't know how old you are. But until you hit puberty this feeling is normal + diff hormones. also from your prev posts it is possible you feel "Attached" to your bro in a weird way (like mentally your brain does it) and you don't feel like other boys until you can detach and teach your brain he is not your hubby.. I hope this makes some sense. Like I am married and have no desire for other men. Zero. If your brain feels married it may be hard for you to feel attraction.

blackkitty, I had to edit my statement, because I read your other threads and posts after responding to this.

I can relate to your hatred, possibly fear and disgust towards boys after what your brother did to you. He is the one who is seriously sick and there is no excuse for what he did. Please believe no one who would suggest there might be something wrong with YOUR brain, you have endured enough!
Maybe the boys your age or the ones you know from school got you to feel uncomfortable due to their pushiness and that reminds you of the things your brother did to you as well. But that doesn't have to extend to all boys/men in general. It might be that you meet somebody who isn't like that at all and who you can trust and spend time with, doesn't have to be alone if that makes you feel safer. Also he could only be a good friend or maybe more.
But if you feel like you might be attracted to girls then maybe it'd be good for you to try and find out.
You could search for lesbian organizations/clubs in your area or even online and make some connections, see if this is actually the right thing for you.
If you are underage - I don't know how your parents feel about it, there are many ppl, esp in the US, who have strange and often religiously motivated issues with homosexuality - and I'd hate to see you get hurt more due to this. You don't have to go public with this but can just experiment and explore on your own a little as long as you stay safe, alright? :)
I hope you will soon find out what your feelings are in this. Wishing you all the best!

I agree plus boys not leaving you alone can be super annoying! As for experimenting. It seems this is what your brother did and he was WRONG. There are limits to experimenting and wher eyou get your limits will decide what you do. For me it's being Muslim and I'm a gurl so I stop at men =P I'm not sure I would recommend it either with all STDS and stuff out there and I just read that story of some kid in college who's friend put a secret cam and now it's all online and the guy even committed suicide... so obviously he cared more about the "fling" than everyone else realized. Which is normal we are made to fall in love. Our bodies are so precious, we need to take the time and think through what we will do with them and with our self. I think about how like stressed I get about exams :P and like a guy/ husband is a much bigger "test" than math hehe so I would want to be so much more prepared. . For me religion works because it gives all of us a fair chance and it makes everyone know what the rules are (i.e. incest, rape, inappropriate touching etc is not allowed) but two people who want to marry and be each others BFF well :) def allowed.

I am very umcomfortable with the way you are trying to scare blackkitty into what your religion deems "appropriate behavior": Experimenting is neither wrong nor does it *have* to be dangerous and you definitely do not have to be married to do so!
Maybe you would like to enlighten us more on the fact that your prophet married a five year old girl and raped her from age 9 on. That is inappropriate behavior in our Western society and luckily in most religions also, so I have trouble taking someone seriously who promotes the Quran gives us the right guidelines for our life while this is the outcome of it.