then NO i wouldnt mind, my best friend is my best friend for a reason.....we have been best friends for almost 20 yrs, if they felt the need to sleep with or date my ex, i wouldnt hold it against them. Id applaud them for waiting until we broke up bc it was clearly something that was on their mind, and they had enough respect for me to wait until i broke up with the person. AND putting myself in their shoes, it must be hard watching sum1 you have feelings for date your best friend, and it must be even harder to be supportive of that relationship.....so yeah, if my best friend wanted to date an ex of mine....i'd totally understand