Thanks everyone for your responses and for your advice on the matter.
I'm certainly not on the look out for a new relationship to be perfectly honest. And, I'm certainly not an open relationship type of person. However, I do find that being out with a friend of mine is doing my self-esteem a world of good. It gets my mind off of things, it helps to divert my attention, it helps to clarify my feelings and what exactly I want. Having said that, my feelings have gone underground that I don't feel much at all - rather numb really.
I haven't crossed any physical line just because my heart isn't available right now to anyone - including my H at this point.
But it is really good to hear about others' experiences in this area because outside interests are showing themselves to me. That's a really good point you make KD about keeping the OP hidden.
When I was in my M, I was strict about boundaries around my R so I must say it is nice to just feel free. My H never imposed any boundaries or guideliness like that on me - it was just understood that we were exclusive. Rarely did I even flirt.
I was reading yet another book by Michele Weiner Davis last night and I was wondering if I had it in me to give the energy it needs to get my R on track again. I am not sure I have the motivation for that right now.
Don't worry - I'm not under the illusion that a new R is the answer to my old R, or that the grass is greener. It just isn't - that I know.
I guess I'm trying to revive my emotions a bit somehow.