Obviously if you tell the girl you love her and she feels the same this going to crush your friend.However if she really does care for you and not your friend the heart break of discovering this at a later date will also be dramatic, the catch there is, it won't be your fault and you likely won't loose your friend over it. If you tell her and she doesn't feel the same you get rejection and likely an annoyed friend as a prize.

The alternative is living with your feelings and not saying anything. If she has true feelings for you it's likely she'll end the relationship on her own.

I would recommend the second course of action clearly, but.. the depth of your interest should also factor in here. If you really, really like this girl ask yourself do I like her enough to risk the friendship with my best friend?

In a related story I found myself in a similar situation except I had only recently broken up with the "friend" in the story. I was planning to move. The "you" in the story chose his feelings over his friend and asked me out. The friend did not speak to him for quite some time, but eventually forgave him.

I married the "you". We've been together over three very happy years and have two sons.

This goes to show advice always has variables. Follow your heart. :)

i think you should tell her about your feelings but you should tell your best friend too,thats because he is you best frnd as you said and if he was he will understand you and let her decide who she loves.

What does this say about you. Obvously you cant be trusted as a friend. Im supprised you have any male friends. Lets start out with the fact that its your BEST friends mate. Reverse the situation. Imagine your girlfriend and your best friend. How would that make you feel. Would you think it was ok for your best friend to disrespect you by doing the same? Is loosing your best friend worth the prize. What can you offer her that she dosent already have? Are you looking for a long term relationship or is this just a crush? Are you willing to take responsibility for hurting the relationship of them? Be a better person and be a just be a good friend. In the long run Karma will be right with you.

You should stay clear of dangerous waters my friend. Just call it being decent. He's your bff. Be in the sidelines. If she feels the same way, she'll break off from your friend. But I guess you have to let your friend know how you feel about the girl when it's safe to discuss this. Be sensitive.

Stay away! You don't ever date someone your best friend has!

If she really does feel the same way you won't have to do anything. She will. If she doesn't break up with him and go out with you instead, it was just wishful thinking on your part. Move on.

Do you really love her?
just think how much do you love her..?
also you must think how much does your friend love her...
if some one you are loving crashed you and went with another one,think how you feel then.
if you feel so...your friend also must feel like that when you took away his girlfriend.
try your way.
think clearly.
don't play with love,it will end up with an injury in you heart.

Walk away. If the couple are happy, then you are destroying something wonderful and there is no excuse for that.