You must be exuding confidence and peacefulness the way that you have been attracting men to yourself. Allow yourself to enjoy the validation this gives you. You ARE desirable. H's abrupt departure from your marriage is much more about him than it is about you.
I agree with MsMelancoly. I think you should take H's friend up on his invitation to visit. He may be able to give you additional insight into what happened with your H and what H has been thinking lately. This info would be useful regardless of how you decide to proceed with your H, since it may help you to better understand what happened and help inform future romantic decisions.
A week and a half ago an attractive man in my cycling club gave me his phone number and invited me (a 2nd time) to go for a bike ride. I am very tempted to accept but am concerned that if I do I might have weak boundaries in my current mental state. I have no interest in dating but have reached a point where I miss male companionship and attention from an attractive man sounds really nice. I'm afraid that accepting his offer could be a first step on a slippery slope. Julia, have you thought through what your boundaries might be in interacting with these male friends?
On the flip side, I took an opportunity to subtly let H know about this invitation from 'bikerman' and ever since, H has shown a greater than normal interest in my cycling activities. I see H's reaction as a way to 'measure his temperature' regarding his interest in me.