That is a hard one to answer!
I will say this: his sister and cousin (female) worked very hard to separate us.
Cousin introduced him to quite a few women friends
One was very interested in him, introduced via FB about a year ago (she is married with 2 kids, at the time was "getting divorced" but this has not happened yet)
I did an event with him, her and cousin last weekend (her H was there too) and could not get a feel for current interest between them. If there is, I see it more on her end then his. She did not speak or act negatively towards her H and I have seen them at other events and felt the same. This time I spent 6 hrs WITH her and him. And since I also met "person who hates me" for the first time you can believe I put my best face forward!!
Also he is mentioning women as being cute etc, said he loaned his car to a "friend" last week. He did this in March when trying to push my buttons. Either he is doing so again (I have not sent him any emails to his dead acct telling him what he means to me in over 2 mos) or he is putting himself out there for real. When we were a real couple this was a common thing but I never worried about it as I was secure in his love for me. I'm afraid yesterday I bit (ie asked who) when he said he loaned his car out. 
Oh as for this girl who "may" be interested (or at least was) she is very positive and outgoing and almost too bubbly. He has done a few group events with her this year that I know of, nothing one on one that I know of. Could be wrong, have not devised the perfect gps system LOL
Not sure if this helps as I don't have a solid cut and dry answer for you! 