Rysmom, only you can make that decision. Right now, I can tell you are pretty shook up from the H encounter. Maybe not thinking straight. Give it a bit of time, and think about it. Now that H opened the line of personal communication, you can continue it, and see if there is still anything there.
Anything is possible, R is possible, hope does not have to die. Heck, I never thought my M had a chance. Finding this site was one of the best things to happen to me. Not all M's are saved, but enough are to give hope to us.
You do have to protect yourself. Could you discuss it with your H in person, without any distractions around?