I've posted numerous comments about this and either I get no response or I get abuse from people telling me that I have no right to question what my single AP does. I still have feelings and want to know how other people deal with it.
I am a MW and get into constant disagreements with AP who is actively dating (intimately). He says he wants more but I suspect he likes his life the way it is.
If I was having an A with a MM I feel it would be easier because there is a mutual understanding. My AP doesn't understand my situation. All he knows is that I am unavailable for a full time relationship and he can be with anyone he wants because he hasn't made a commitment to me or anyone else. I totally understand where he's coming from, but it's still difficult.