Try not to read anything into his calling when he could be texting because there are a million reasons why and you just do not know. Take it for what it is, he is making contact with you. I am happy you have found that calm. I have found it as well. Many posters here will point to success stories of people who have truly let go of their spouse. Once the spouse realizes this, they begin to move back towards you. Be careful and do not jump the gun because you will scare them off if you seem too eager. Patience. I am in the same spot where after a long period of dark, my W is making a ton of overtures and communicating. It is easy to want to figure it out, but best remove it from your mind.
Good luck!
Me: 42 W: 32 Married 7 years together 8.5 S1: 7 S2:7 Bomb #1: 09-16-13 Recon #1: 11/13 A discovered 04-03-2014 W filed D 05-19-14 but never served me I filed D 12-02-2014 S 05-31-14 Divorced 5-19-16