Take the good ideas from this guy and emulate what your W and you like about him, but he sounds creepy to me. Such a wonderful person, but he was hanging around at your house because he has few friends? That's a little off. He developed "special feelings" for a married woman and decided to act on them, that's a little off.
But the surface stuff, you can emulate to your advantage.
Adinva 51, S20, S18 M24 total 6/15/11-12/1/12 From IDLY to H moving out 9/15/15-3/7/17 From negotiating SA to final D at age 50 5/8/17-now: New relationship with an old friend __ Happiness is a warm puppy.