Search Results: flirting with a customer

I work behind a bar and there’s this customer who comes into work every now and again. Here’s just a very general summary of the situation so far:
a few months ago, we would kind of catch each other’s glances and smile/ giggle but we wouldn't really talk 😂 Eventually when he was really drunk one night he asked for my number and said how attractive I was etc. The following week that’s when he messaged me but the conversation more or less ended as soon as I left it so that he had to make more conversation. Anyway, I’m a bit shy and I got into my head that i had put him off because he wasn’t flirting with me so I pretty much ignored him/ didn’t look at him because I felt awkward.

BUT THEN, the last few weeks he’s commented, making conversation publicly on posts I share on social media regarding animal welfare (it’s something I’m passionate about and seem to have in common with him). This made me feel more confident with talking to him again so I’ve been plucking up the courage to talk to him in person.

The other day, after he had a few drinks, after I had served him he waited to talk to me and asked me about my shifts and we made general conversation. Then last night, to bring it up to date* 😂 whilst I was working he messaged me from across the bar but I didn’t see it until I had went home. Like last time, there was some very tame flirting but as soon as I gave him a reply he couldn’t easily respond to he let the chat die 😂
is he shy or just not that into me?
Just some details about me and him- he does seem shy and quiet, he always has a drink with his dad and I don’t see him with many or any friends on social media. He seems reserved in that sense. He doesn’t seem like many guys my age at all which is what draws me to him.
myself, I am, well not shy but I have low confidence so it’s hard for my to gage whether or not he likes me 😂