Should i text him or wait for him to text me? & why hasnt he textd me back?

So i've been talking to this guy and for the week we've been texting like evry day til 2 am .. & i got so use to him texting me. so last night we were texting and he told me that he cant wait til tuesday so we can see each other and he told me that he's sweet to me because he doesnt want to lose a girl like me.. :) & i texted him back saying that he's really nice & sweet. & after that he never texted back not even this morning and im so use to him texting me back.. idk what should i do? should i text him later? & why didnt he text me back?? please help!