Wait for him.
Talk about it with them. Tell them you like the relationship the way it is, but it may screw things...
You can't control who he likes and doesn't like. Just know that if he's with you, then he obviously likes you more. As long as your friend doesn't like him back, your relationship with your friend should be fine too.
Yes, you should talk about it. Communication is key when it comes to having a good relationship with someone.
just stay friends, your friend should understand
Yes. If you like her and she likes you, you should deffinately date.
Sure, if you like him and he likes you, then go for it.
Test him when he likes you too!
Walk out of the relationship, in a subtle way.
This is a discussion with various points to be addressed befor an 'estimated answer' can be placed.
only if you like her back
ask him why he likes you and when he started liking you
Forget about her till she is alone again