Let's see what I can come up with here:

1. Daniel talks to you all the time.
2. He's incredibly sweet to you.
3. He treats you so well.
4. He compliments you.
5. He confides that you are the only person he likes at work.
6. He's asked to hang out with you.
7. He appeared happy that you gave him your number.

All evidence up to this point, seems to indicate that Daniel likes you. So rather than dismiss this evidence simply because he didn't call you, let's assume he does and ask the question, "Why would a guy who likes a woman, not call her?"

Any chance he's vacillating between thinking maybe you like him back and thinking he's totally delusional? He's scared. He likes you and he's afraid he misread signs that you liked him back - in spite of you giving him your number. I mean, you've got seven reasons to think he likes you and your doubting it...he's probably doing the same. If I were a betting man (and I am ) I'd bet that's exactly what's going on.