What should I do, does it sound like i'm nagging him?

Okay there's this guy, that i recently met. I thought he was cute,but was not able to tell him. Finally when i did, he gave me his number, telling me to txt him sometime. We started texting, and decided to not talk to other people, while we were talking to each other. this was over spring break, we made plans this past sunday to go see a movie, but it never happened because he never replied any of my texts that sunday. I sent him a total of four texts on sunday, but nothing not a reply to any of them. Since we have been talking, i always text him, he has never text me first, and that's okay i totally understand i guess. i don't know, i feel like me texting him, is making me seem like a very naggy girl, which am not, am just totally into him a lot. He is so sweet and amazing! Today is monday, i didn't text him the entire day, but later on at like seven, when i was done with my home work, i text him, the text said"are still ignoring/being mad @ me? if you are, say it and i'll leave you alone" was that a bad i dea? i don't know what else to do? please help?