Questions: Guy's Behavior

Specifically when you've only been talking for a few weeks/months, and nothing specific happened.
The blocking is a result of your own lack of confidence, rather than any incident/misunderstanding taking place.

I’ve worked with a guy for two and a half years. We have a flirty relationship and we tease each other. Examples of him flirting include: prolonged eye contact, staring, gazing into both eyes and at my mouth, doing silly things to get my attention, showing slight jealousy.

We bumped into each other on a night out and a random person thought we were a couple. He said “I should be so lucky” and later on I admitted to him that I really like him and have feelings for him.

I asked him if he liked me/felt the same way and he said “you’re a lovely person”. I kept asking him, and he kept saying the same thing.

I then said “please answer the question” and he snapped at me saying “yes I do but we can’t be together”

We both drank a bit but he didn’t seem overly drunk at all.

Do you think there was any truth in what he said and do you think he meant it?