Is it bad to date my ex’s best friend?

Okay so I was with this guy for about five months when he decided to cheat on me. At first people were telling me about it and how he was with other girls but they were just rumors so I didn’t even bother asking. Then he broke up with me, BUT he didn’t even bother to tell me in person or at all. He sent his best friend to do so. The guy got a new girlfriend in like two days. So I was pretty sad and mad but also disappointed. Now his best friend and I are talking and have been doing so now for a long time and I’m beginning to like him. And I’m not sure if I want to get with him because if the fact that he’s my ex’s best friend.
Is it bad to date my ex’s best friend?
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