JO SAYS:

Yes, I believe people can change. I think the fact that she has humbled herself and apologised shows that she’s genuine. However, I believe the real questions are; ‘can you forgive her?’ and ‘do you want her back in your life?’. Only you will know the answers to these pending questions.

If you do start over you will have to leave the past firmly in the past. It’s not fair on either of you to do otherwise and your friendship won’t stand a chance. Whatever you decide, be honest with yourself.