I have been down this slope too, you will regret it if you do these things, I promise.
I paid $500 towards my X's student loan w/out even telling him b/c I did not want him to have to deal with it (then I would have to hear about it even though it's nothing on me). This was just a month or so ago!! As soon as I submitted payment I regretted it.
I was in a fairly good place financially but this month has had lots of unexpected expenses. I sure wish I had my $500 bucks back.
I get the answering the phone due to not wanting to hear the text too, but truly, don't do that either. You don't do yourself any favors. Say what you mean and mean what you say. If you are all wishy washy and give in on stuff he will use it to manipulate you, I PROMISE.
Stay the course. Recognize this as a weak moment, learn from it, and move on.
Said from someone who has learned the hard way.
Hugs. It's hard and sometimes I am guessing you lose sight of this, but you are doing fantastic!!!
XXX