The guy I'm talking doesn't remember things I tell him , what does this mean?

Anonymous
So I met a guy on Hinge and we have been chatting over the phone for a week. He replies constantly and almost instantly when I message him and he seems Interested, the problem is that he doesn't remember things I tell him. For example I told him my birthday is on the 2 Feb and today he asked when my birthday is. Another time he asked if I watch anime, when we already had a lengthy discussed about anime a few days ago and I even sent him a trailer to my favorite animation. I remember everything he tells me? Why doesn't he remember things I tell him? Is he not interested or something?
The guy I'm talking doesn't remember things I tell him , what does this mean?
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