Flirting or nah?

There’s this cute guy that works in the same building as I do but we don’t work together I see him like 2 or 3 times a week in the parking lot. Its just a good morning and good bye kind of relationship lol Today I was leaving work and he had two stacks of boxes he was carrying and I was kinda far but I still offered to help because they looked heavy. He said “oh no I’m good” and I was like are you sure they look heavy and he said “I got it see these arms they’re steel” and I laughed because he’s not like super buff but you can tell he’s still pretty strong. So I was like okay lol then he just said “thanks though have a great night” he’s so cute but I’ve always been so bad at flirting like what is that 😂😂😂