Most Helpful Girl
Depends on what you did and who broke up with who
Most Helpful Guy
You have little to know chance of getting her back. The fact that you hurt her already would always haunt her and she will come to expect it again someday.
Flip it the other way... if she hurt you by cheating on you, lying to you, etc., whatever the case may be... could you trust her again?
Be honest... it is doubtful!