I would not get into discussions about him with his family, and it might be wise to ask your family to keep some distance / not comment too.
He has moved on , but is stopping you from doing the same.People do not stay freinds in these situations, he sounds a bit controlling to be honest.
Sadly you are dealing with a proven liar and a cheat. No doubt he is lying to the ow too as she would bin him if she knew he was ringing you up all the time.
He doesnt go to her house because he doesnt want to say No cos she,ll get upset ? He goes because he wants a shag. Note hes implying she,ll get upset at missing out on his fantastic company !
She wont even let him stay the night ffs !
Its possible that this is nothing more than a fling, and he might well know it, hence his insistance at keeping contact with you.
Does ow drive? Its telling that hes doing all the travelling , that he hasnt met her freinds ect, hes probably just a bit of a shag.
Honestly, he sounds like a total twat. Tell him to fuck off and chase his ow, who incidently doesnt sound exactly smitten with him.
Have a look on baggagereclaim, a good website for these sort of situations with a good insight of whats going on with these idiots.
Dont let him ring you whinging hes scared ect, just dont answer, full stop.
Seriously op, start going out, buy some new clothes, get your hair done, start doing all the things you wanted to do but never did.
Make a list of all the shit things hes said or done and keep reading it.
Hes got a nerve whinging to you .
If you really cant block contact just yet, at least play him a little. Id be saying that actually its for the best, weve been unhappy for years havent we, and i can understand your affair ect, ive been tempted myself on occasion, but hey ho.
Watch him backtrack.
Seriously though, just cut contact, your not his mammy and hell have to sit in his own shit. Bit of a nerve that he still expects you to emotionally cater to him, ie hes scared. While hes looking to you to reassure him and meet his emotional needs, what reassurance is he offering you ?
Has he always been like this ?