DO I HAVE A CHANCE? or are we just friends?

Honey, if you like him go for him. You have to do what is best for you in life. If you and your best friends stepbrother have a problem, I might consider staying friends. If you guys are fine tho, talk to him! Im sure it would be a great relationship. Im 21 and already went through high school years. He definetley likes you. I hope this helps you! And remember, be yourself because a boy will like you for who you are, and it seem like he does.(: