-YES or NO

It should be an easy question.. You wanna be mine? The only answer would be YES or NO.
But why is it so hard to find the right answer?
I mean.. I like this guy but he just finished his last relationship and now he wants me.
The girl is a friend of mine and I don't want to hurt her... This is defferently something I've to think alot about the rest of my Christmas holiday.

AWW! I think I'm gonns be SICK!!!!!   HELP ME!!!