Gave a guy my number 4 days ago. He still hasn't called. Did I make mistake? Or he wasn't interested?

Nolaxoxo
My friends and I were at a party Sunday. As we were gearing up to leave a guy approached me and asked for a dance. He was quite attractive and was my type so I agreed. We danced for about 5 minutes, two other girls that I don't know started dancing with us as well. He even complimented me and my dancing. It was a really good time.

He stopped dancing and asked if I can take his number, I found this quite odd usually the guy takes my number. But at the time my phone wasn't on me, I told him and he had a sad look on his face then said well can I take yours? I said yes and entered it in his phone. He asked if I lived in the area I said yes and he seemed to be excited. After that we said goodbye.

It's now Thursday 4 days since and I have heard nothing. Am I overreacting and guys really take this long to contact a girl? Usually I get a text the same night or next day. Was he all that interested since he only offered his number at first? But he's the one that pursued me it was just a dance we didn't have to get numbers. Maybe I should of just went and got my phone and be the one to contact him, but it would be even worse for me to contact him and be ignored for no reason.

When I was putting in my number I noticed that his screen was badly cracked up and he told me he dropped it earlier that day. Could that be a reason? I'm just a confused. If he doesn't contact me oh well, I just want to know why get a number and not use it. All opinions help, thanks :)
Gave a guy my number 4 days ago. He still hasn't called. Did I make mistake? Or he wasn't interested?
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