LOOONG STORY PLEASE READ ALL TO UNDERSTAND?

You must be very heartbroken right now. At least you know that you were wrong. make sure you apologize to Dylan not because you want him back, but because you are sincerely sorry, You should learn from this mistake and forget Callum (he is obviously an a$$hole for kissing his friend's girl while he himself is in a relationship). Be strong, learning from this will make you a better woman in the future ^_^