would you get into the ex of one of your friends?

I think it’s okay if your friend doesn’t have any problem

No, I would never do such a thing. The fact of not getting involved with your friends lovers is the best way to demonstrate your loyalty towards them. If you are not capable of resisting being with someone for your friends, then what are you capable of ?

It depends. I would do it if my friend is fine with that and if they ended in good terms. If they end they relationship in a bad way or he broke my friends heart, that would be a definitely "no no" for him.

As long as they are still not together and your friend is fine with it, this is acceptable. Specially when you were negligent with certain person, and now your friend wants to take the chance to make that person feel the way you did not make them feel. #TrueStory

I understand sometimes things could happen and that strong feelings could be really difficult to control ,in this cases talking with both of them and having your priorities clear might work .However I am not agree at all with this since I consider it a lack of respect with your friend and you as yourself ,reason I prefer having my friends ex's far away .