I'm glad that our replies have been of some help to you, Marioman.
I, too, agree with Jo.
Do remember that, when a relationship ends, it's as if it dies ~ and you have to grieve.
Also, remember that people tend to become defensive, if they feel that they are being criticised ~ especially if they are feeling guilty.
No-one is perfect, that's why, if a relationship is in trouble, and the couple wants to save it, both members really need to see a counsellor.
Good luck, with whatever you do.