@VW1977,
"I did it just because I could'
Really?
Did the girls throw themselves at you?
Did you like the challenge of the chase?
Did you not know any better? (you had bad role models for marriage and sanctity of vows. That's what you were taught how men acted towards women)
Are you impulsive in any other area of your life? (spending, gambling, eating, drinking, risk taking?)
Now you have met "the one" who makes it all unnecessary.
Still SHE does not trust you, so she has sent you to get help before she commits to an UN-comitter. Smart woman. She wants you to be a better person. And protecting herself from being one of your repeaters.
You are bored with the past life as a cheater and want to stop this behavior - or at least find out why you do it. Get that counseling (older male, lest you try to seduce a woman counselor)
Good luck!
PS Are you Italian, BTW?