Well, here's a thought...
Let's say you have a really close friend. You've known eachother as long as you can remember. You hang out all the time, get along perfectly well.
Now, there is a girl/guy (whichever you prefer). You are attracted to him/her, and want to ask him/her out (and have a good chance at them saying "yes"). But before you have the chance to, your friend confesses to you that they really like this same person.
In this situation, what would you do?
You know that if you go out with that person, your friendship with your friend will be crushed, along with your friend's feelings/heart.
Yet you want that person's company.
Would you let your friend ask the person out, or would you throw away your friendship for the person instead?