if they cheated on you once, what makes you think they wont do it again if you give them another chance? your giving them an idea that its okay . i highly suggest moving on WITHOUT them . with cheating, no one deserves second chances .
I'm still in a relationship with some one who cheated in the past .. We now have a child together .. And it has not happened again.. It's all up to you and it also depends on the kind of man your boyfriend is