Please help me stay strong with 'going dark'

This will be very hard for me b/c I want answers or maybe not even answers, I just want to feel better and I know that my stbxh can't give me comfort right now but I have decided to 'go dark' on him. I advised him today that he is to no longer contact me unless it is about the kids. If he feels he needs to contact me for any other reason, then he needs to email me only. He keeps coming at me with this child support and giving me a sob story that he can't afford to pay me what I am asking when I am paying more in just child care and just his insurance then what he wants to pay me. He has no idea that I am going to a lawyer really soon as soon as I can get the money together to do it and I am going to fight him on this. I will not allow him to manipulate me into being strapped for money when he is the one that gave up on his family and refuses to take any blame for it. So far, since I told him not to contact me anymore, he sent two texts asking me why I was doing this and that he was trying to be cordial. Then he asked what time I was dropping off kids and I told him in one word. THen he texted me again saying that "he doesn't want things to be this way with us and that he is trying to stay cordial through all of this" and I won't respond! Please remind how important this is for me to regain power over my life. He hurts me everytime that we talk by telling me that he just wants me to be happy and that he didn't want this but it is the only option that we now have and that is to divorce. It hurts everytime he does this and I can't move forward. I am determined to no longer talk to him about anything other than the kids and that is it. No more feelings, no more child support as I have told him to pay whatever he deems fit until we divorce while I am keeping track of everything that is spent and have a notebook ready for my lawyer. This helps to regain some control of a situation that I didn't want to be in and I need to remember this! Again, please remind me how important it is for myself to go through with this and detach from him all the way! Thanks so much!

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