Forgiving does NOT mean forgetting. Do not waste your energy and time “trying to forget” because that’s pointless. Remember your mistakes made and lessons learned, so that you will not make them again.
Forgiving does NOT mean you’re telling that person that what he/she did was ok; forgiving means letting go of the anger, hurt, resentment, insecurities, low self-esteem, guilt, regret etc. etc. etc….whatever is holding you back from moving on.
Forgiving does NOT mean you have to let that person back into your life. Forgive your previous blindness, naivety, trust, and let go.
1st-round is a mistake, 2nd-round is plain stupidity.