I'm in love with my married friend
I'm curious, have you tried telling your friend about how you feel about her?
No, but I want to tell her.
It is a bad idea to confess feelings for a married friend. Either you will lose the friendship, or you will break up your friend's marriage. It would be better to hold your silence, and find a single person to direct your interest at instead and hope your feelings for your married friend fade.
Dude she's married and I don't think she will leave her husband just to be with me.
If you think she will be happier with her husband then you should just move on and find another that is single and that would be happier with you, so that you also would be happy. I suggest you do focus on that relationship rather than trying to ruin other relationship that you do not belong.