You know, there are so many marriage coaches out there and as an information junkie, I have compared most of them. It helped to sort through the BS, but can distract you from having a clear plan and following ONE path. That said, you have the choice of doing the 180 or the LRT from MWD's books. You also can work on rebuilding the connection which is what you are asking regarding contacting him or not.
If you are working on yourself and GAL, that is your most important task. Then you are happy and whole with him or without him. Have you thought of one-way texts to maintain a connection? I just don't get going dark and thinking making it easy on them and not talking for 6 months is going to make anyone miss you and want to come back to you. But a big thing talked about here is that a WS needs to see the loss of something before they snap out of it. If you follow that, then it is more of a "tough love" approach. You are a shining beacon of positivity and change and when they looked back, you weren't chasing after them which makes them curious at least.
And of course you can really, "move on" as in, "I don't need this and I won't be waiting if and when he ever changes his mind"
As for his line about he didn't think you wanted to be married to him, etc. That is pure script. I've heard the same. Or, "you are just worried about the financial loss". Basically, it is trying to turn it around on you. Ignore that.
Good luck and hang in there!
H:54 W:46 D:11 D:21 M:12 BD:1/15 In-house Separation 2/15 DB started 7/15, W sees consistency 9/15 Dropping the rope and having her leave 2/16, moves 5/16 Reconciliation 1/17 Obviously still struggling