I think I will give this one a shot.
Alright, first off. Your friends are being really immature. It really has me wondering what grade you are all in. Anyways, first off let's deal with what is going on with you. So you have this crush and he either still knows you like him, or he has forgotten. Chances are he knows, does he avoid talking to you now? Or are you the only one nervous with talking to him? Just act like yourself, no need to feel awkward, so he knows you like him, no big deal. Don't let things be awkward. If you start that sort of thing he might think you don't like him.
Second, your friends are being very childish, they obviously know you like this guy and aren't being very sensitive to the fact that your feelings are being hurt. Sadly, they might not notice what they are doing. Your friend says she is just joking and if she seems sincere I wouldn't press the topic.
Crushes come and go sweetie, it's the way of life. My best advice is that in the future you don't share who you are crushing on in front of certain friends. Don't let this guy or your friends get you down like this, it really isn't worth it.