He left again, but why?

he was texting me almost everyday and we talked on the 4th of this month and he was drunk but he kept saying babe I love you. Then later in the day when he was sober he asked if he could come see me, and I said yeah, because we haven't seen each other in a while, and he responded with "really, duh" and then he started taking longer and longer to respond. I texted him if he wanted to come see me he could, and he doesn't respond, then at night he starts sexting. At 11:30 he stops texting me and I haven't heard from him since.

We've been broken up for over a year it was his choice, but he always kept it contact with me. He does tend to come in and out of my life. He's always told me how much he still loves me and never wants to lose me. I miss him but I will never initiate contact with him.
He left again, but why?
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