Should I text him this?

So there’s this guy at my work, he works in a different department than me, and we’ve been casually dating for almost a month now. I know I’ve been a little difficult to get to know, it’s just the way I am- I’m a little shy. I’m worried that because of this he might lose interest. He’s kind of the one who always texts me first and always comes up to me at work. He even came up to me at work today to just give me a hug. When I left I didn’t say bye and I feel like I should’ve. I want to try to put myself out there more and I was thinking of texting him first. I want to be bold, but not too much.

I was thinking of texting him, “you’re literally all I can think about”

Is that cute and flirty

Or weird?