New to the 180. Help?

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I feel like its back firing because he's not at all intrigued by my sudden detachment. More like he's annoyed. He keeps asking me what my problem is and it makes him angry, which I feel like is pushing him away further. I'm not mean or anything, I just not overly chatty or act like I'm super excited to talk to him like I used to be. Normally when I call or he calls, (since we live in different states this is the only regular contact we have) I tell him all about my day, whats going on, about our son, etc. I ask him about his and so on. Now I dont ask about his. I let him talk and theres awkward silences because I normally fill them. I mean, hes noticing..but is that the way I want him to feel/notice?