This happend to me before,
Except they were BEST friends.
Don't choose one over the other, because you don't want to be the one responsible for ruining their friendship. Tell them to work it out themselves, because odds are the problem between them isn't something you can solve.
For example:
If you said yes to Guy #1:
-Loses friendship with Guy#2
-May never get that friendship back
-Odds are the relationship won't last forever
-Guy#2 may never talk to you again ..
etc.
Same with if you said yes to Guy #2
If you let them work it out:
They would probably find a resolution between each other.
If that doesn't work, then you probably like one of the guys a little bit more than the other, so communicate that to them. You shouldn't have to go for the guy you don't like as much.
Chat with our AI personalities
It's important to communicate to both guys that you value their feelings but you need some space to figure things out. Clearly express your boundaries and take time to assess your own feelings before making any decisions. Remember that your feelings and well-being come first in this situation.