I agree with Psychomom, this is an awesome request.
About you having the strength and courage to deal with whatever your friend does... I was once tying myself up in knots over a similar situation. I cared about a friend very much, who wasn't a Christian. God had to gently remind me that it wasn't my job to make my friend say, think, do or believe anything, but rather to say and do what He wanted me to say and do... when He wanted me to say and do it. Everything was a lot more peaceful after that.
I pray that He will very clearly lead you, and that you'll have peace about the whole situation. ♥ "But ye are not in the flesh, but in the Spirit, if so be that the Spirit of God dwell in you."