What to do ??

Ok so I don't want to mess this up... I do like this guy we work for the same company but at different stores. I would always talk with him when I go to his store and see him. But I would always play around and calk him my boo. Until finally when my friend transfered to another store she know that I liked him and told him I believe. Long story short... I got his # and we talked and texted for 2 days straight. Flirting and were even gonna hang out together on Monday... But he hasn't texted me back or anything today. Like is he even still interested at all or maybe busy ?? My thing is... If he's busy... I mean I know were not together and I can't get mad about it but I would love to hear from him.... But I'm not gonna blow his phone us with text messages .... What should I do???