Is it normal for me to follow a guy at work?

Okay so there is this guy at work that works in a different department and since summer I caught him checking me multiple times when i went out for a smoke or saw him in the hallway. Yesterday i started to find him cute actually. I went with my friends to a nearby cafe and we was there with his friends too. I went to pay the bill and he immediately went to pay it as well. When the waiter came he wanted to take his bill first but he said: no you can’t take here first, and I liked his voice lol. I found him on instagram through a colleague but I don’t know if he will think I’m a creep lol.

Is it normal for me to follow a guy at work?
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