Should they get back together?

A year ago one of my friends broke up with his boyfriend. He really did bad things to her even I cannot forgive him. However, not a long time ago, we saw him and my friend started talking to him again saying me he has changed, has a better personality than before and this time really trying for her. I don't think he has changed that much in a year but she is considering getting back together. What do you think ?

Should they get back together?
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