You are far too young to be dating and it's highly unlikely your step-brother's friend would date someone you age as "Statutory Rape" is law in most States. He wouldn't want to chance it and he's probably more interest in girls his own age. The fact you know you would have to meet in secret means you know it's wrong! Sorry.
She looks at you in a special way and likes to touch you.
Ask him or throw out subtle signs and see how he reacts.
There are many possible signs that a guy likes you back more than as just friends. One easy way to find out is to simply ask him.
ask them. if they still say no, look for signs of lying. if you really are her friend, you should understand how she reacts.
Either you can ask him out or you can wait for him to ask you out.
Maybe he likes you as a friend, and there is always a possibilty that he is gay. Don't take it personal. It sounds like it is about him.
Look for signs. Like maybe if he makes you laugh alot. Or maybe he looks or stares at you.
to tell if he really likes you is one way to simply ask him or look for signs like always talking or staring at you touching you talking about you or finding ways to show you that he likes you
go over to him and flirt
It depends on his relationship with his current girlfriend. Are they having problems? If yes, then maybe he is interested. If not, then he might be just wanted to be your friend and actually cares about you as a friend. Or, he is trying to cheat on his girlfriend.
Ask her best friend, or watch her for a while. Be nice to her, lightly touch her arm, and see how she reacts. She'll be all over you.
If he still talks to you and takes the time out of his day to spend time with you. There will be signs if he has stopped liking you and hopefully you will notice them.