I am in a similar situation. My relationship and his cheating/lying has gone on the entire time (5 years) and still is. That's why I am here again looking for a shoulder to cry on or couch to sit on. I know I should leave but its like I'm looking for some one to say it to me or validate it.

He's always apologetic only after the evidence is put in his face. When I give him an opportunity to confess on his own he never does. I'm a fool and just hope I can get out soon. I hope you make a wise and healthy decision, good luck.