Umm..... help please.

I am unsure how to think about this. A coworker and I have gotten pretty close. We usually joke around and flirt with each other. We talk a lot outside of work, most of it pretty flirty. We have often vented to each other as well as helped each other through some tough times. He has since moved to a different area and works at a different branch. Well I sent him a picture of my face and outfit the other day, nothing dirty, with the caption good morning. He replied with well good morning to you too 😍. We often send memes to each other. Well later that day he sent me some memes with the caption I miss your laugh and your goofy self! Normally he isn’t that vocal about his feelings and I am unsure if he is truly meaning what he is saying or if I am just getting wrapped up in my own feelings.

Update: asked him out and he admitted to me that he has a girlfriend. Which was a shock to me. There are no pictures of her on his social media and his Facebook says he is single. Unsure how to feel about this. Pretty sure he was just using me for the attention.