OP the answer then is simple- if you do really want to make it work with your H then you have to stop all contact.
The question though is do you want to make it work with your H, or does the OM offer you something better?
You keep trotting out this line that you don't want to hurt your H etc and you want to make it work- but do you really?
If you did, then you would stop all contact with OM.
If he wants you, and you feel he is your soul mate, then maybe you need to face up to that and end your marriage.
Noone likes to inflict hurt, and I totally get your point that you want to love your H again- BUT you can't turn back the clock; the OM is now in your head and your life.
Which is the fantasy? A life with OM, or a better life than you have now with your H?
If the latter, what can you do to make that happen? what does your marriage need to give it a shake up and make it better?
If your H simply doesn't "get you" like H does, then you need to face up to that.
Can't you and your DD move out for say 6 months, or can you ask your H to move out so you can see how you feel?
I don't see how you can think over this any more- you need totake some actio, along the lines of:
dumping OM properly- cold turkey
moving out and seeing OM
DH moving out
couples counselling
counselling for you on your own.
Please don't think I am being unsympathetic. There have been 2 men in my life whilst I was married who really "did" it for me- the ex was one, but there was someone else who was a friend and it became more, for me. I know exactly where you are in your head, but you have to move-on in one direction or another.