Why did he drunk call me?

I haven’t talked to this guy that used to take me on dates for months & I told him happy birthday & he said sent me a kissy face while saying thank you but i just said “ you’re welcome” & didn’t respond after that. He then drunk called me 2 times @3am. he was responsive but clearly slurring words. He said he wasn’t drunk and said sorry for calling because i was confused & then said “you know what im going to sleep.” 😂 i asked him about it in the afternoon and he was like “what do i mean” & i told him what he did twice and asked if he was good and he only said “yeah im good”.
Why did he drunk call me?
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