I'm in the same boat, Gan. No kids means no contact for the most part. He's receptive if I reach out, and we can even share a laugh or two, but I don't know if it's advisable to continually be the one to contact first.
It's so confusing, I feel you on that score.
ME: 38 BF: 40 T: 10y, no kids, no M (by choice) BD: 7/14/14, BF admits to PA, wants out, lies about new R. 10/1/14: I move out, BF lies about move in with OW 12/4/14: OW confronted, reveals all the lies