sue,
I know first hand it is hard to not wonder about such a friendship...perhaps it was my worries that pushed h further into the friendship...but then in my case the friendship was hidden from me.
ff may have at one time had her eye on your h...the shoulder to lean on through a diff time..but has found a new man..so no need to worry bout her..
as far as h...does it matter at this point what the ff meant to him??? maybe he did have feelings for her? maybe he's feeling down with her not needing him anymore...does that matter??

if h is not initiating any conversation (even small talk) then I would suggest you let him be..if he is watching football and you have other things to do...do them...let him be...I'm sure it is uncomfortable for both of you sitting there...so let him be..let him be comfortable on his couch in his home...remembering how cozy it is there...do some little things around the house to spruce it up a bit...a little decor change ya know..

be comfortable and go about your business...you keep feeling like you should go in there and make talk with him...it's not working for you because you are feeling like you have to initiate...
eventually if you keep busy or run out to the store while he's busy with laundry...he'll have to initiate some talk!! and if it's lead by him...you'll feel a whole lot better.

that's all for now...take care.
LL