If your friend did the breaking up, its more socially acceptable to date your friends ex. Under all circumstances, it would be a nice idea to just ask your friend politely if he or she is okay with it. Things get more difficult when its your friend who got dumped.

What do you do when you like your best friends ex boyfriend?

If you have a close friend who is reeling from a break-up then you absolutely need to speak to her and talk to her about her feelings about you possibly dating her ex. If you have made a definite decision to date him then let her know that and reassure her that you will date him but will be low key about it.