Definite clinging boomerang over here. BD was May 2010, he moved out Nov 2011. He acted like it was painful to be around me when he was here, but panicked slightly when I agreed that he should move out. He would come back every weekend to be with "the kids" and called daily. After a while I noticed that some days he never even asked to speak to the kids, just me. If several days went by without me talking to him, I'd get an email or text. A few months in, he even suggested that it was time we bought a bigger house - something we'd been on track to do before the alien abduction.
At one point I asked him to stop pretending it was about the kids. I said if it was really only about them, he'd find a way to make plans with only them and not always have "family time." He didn't disagree.
I found it most challenging in the beginning, before I knew about MLC (or the OW - which he denied for over a year). I could feel him wanting to be close, then he'd turn his back on me again which made me wonder if I was imaging it. It kept me engaged, which I guess was the whole point. Now that we're reconnecting he says I wasn't imagining it, he was just scared.