Long story short, as other have said before, depends on how it ended. If it ended on a bad note [cheating, immediately starting dating someone else, fight, etc.], it likely won't work. Even if it seems like it might, something will rear its ugly head and prevent it from being a good relationship.
Sometimes, depending on the fight, it can be a good thing. On of my relationships end because of
my immature actions, basically I would slag her off, nothing serious just a joke here and there but there came a time when she told me to stop once to many and stormed out the house so I followed her and when we were out in the main road she let rip, I don't blame her, it was brutal, almost broke me. Once we got everything off our chests we saw that the cracks had become ravines and a boyfriend/girlfriend relationship wouldn't work long term but it did help the friendship itself as we now understand each other down to a tee almost. :happy: