Crush related?

I have a guy I work with. I know they say work relations don’t usually work. But I don’t get out a whole lot 😂...anyways, it took me 8 months to realize I liked him on a week that I was super busy. When I got back from a trip I got all my coworkers a gift, gave him my phone and asked him to call me. He never reached out. A few days later I told him in person I was interested in getting to know him better. (Mind you get is a huge introvert). He said he didn’t think we needed to do that. So a couple days later I wrote him a letter explaining my feelings and intentions and put my phone number down again. We have our phone numbers posted in case of covering a shift. His phone number was posted before I started here. A few months went by and I left him alone, last week I talked to him again and he said he doesn’t date coworkers, but I have a strange feeling he’s hiding his feelings because of how he talks and looks at me. Should I get his number off our sheet and message him or not mess with it for a while?