I'm confused as to why you are even entertaining the idea of going on dates with your wife or being physical with her when she is still at the very least spending time with OM. Are you comfortable in an open marriage?
It is very strange to me the way you question her about what she is doing with OM while you also pursue her. It seems very self-destructive to me.
Why have you not set a boundary with your W wrt her still seeing OM and also having friendship with you? ?