A lover is someone you have feelings for; but not just any type of feelings. You feel for this person what you will never feel for someone else, or at least not for a long time. Now a friend is someone you love in a totally different way.

You should ask her out because if you don't, you are going to wonder about "What if..?" You never know, maybe she likes you too. Go for it and Good Luck.

Try to talk to him and let him know how you feel. If he cares about you, then he will definitely open up and respond. Well, he should care about you, because he is still with you. Take care.