Claire i am very sorry to hear what you are going through right now

,and i also think how brave of you to ask for help on here by not going under a different user name

.I hope he just needs time to think things through and work out what he want's+realise's-it's you.Do you wish for it to end or is it one sided?.
I was told this by my fiance back when i was 18yrs,also was told 'i can't bear to have s*x with you anymore as your like my Sister now,not my fiancee'.
It broke my heart+turnt my world upside down,we tried to get through this,but i knew his mind was already made up-but I still tried but it was'nt meant to be and 2weeks later he was gone back to his mum's.In between them 2 weeks-i found out he was seeing someone else-someone i knew(i am not saying that your Dh has someone else,just telling my story).
At the time i was hearbroken,devasted+turnt to drink,but like Joh, i am glad it did'nt work out as i would'nt have met Dh+had my girls.(i also still see someone still linked to him every now+again+boy i am glad i was well shot of him).
I do hope things are not as bad as they were for me+that you can both get back on track,you both need to sit down and talk things through on a neutral ground-not at his Mum's+not in the marital home-i would'nt rush him into talking things through-not at first anywayi,give him the time he obviously needs,i wish you both lot's of luck,take care Claire

.x.