My friend i madly in love with a married man. she is only 21 an dhe is 31.?

to cut the story short. she met him when he was single but kind of engaged. he got married to thi slady because of family pressure as he said. he keeps saying he is getting divorced and promising my dear friend heaven and earth. i advised her to move on. everytime i advise her we end up in a fight or quarelling. he even told her that he doesn't sleep with his wife but they live in the same house even if they are getting divorced. please she needs help. it's been goin on for almost 3 years.