Worst listener ever...

So idk if this just started happening once we got married, or maybe I just started actually realizing it.. But my husband is literally the worst listener ever.... He admits it too by saying "I have a very one track mind" or "I get distracted easily" like no dude you just blank out when you hear my voice I guess! We will be "talking" about anything and he'll give his side and immediately when I start saying a word I see his face go blank or he looks away or he gets "distracted" and when I stop talking mid sentence because I realized he isn't apart of the conversation anymore.. he'll start a new conversation! Or let's say I do finish saying whatever, I'll look at him for a response... But nothing! It's like I don't fucking exist once I open my mouth! At first it was nothing, he and I never argued about it, it's just recently when I noticed how bad it has gotten ..... Lately I just haven't tried having simple conversations with him bc I feel like its pointless.... He's a sweet man, but he doesn't listen to anything ever!