Should i wait for him??Confused??

he text me 2 days ago telling me he likes me but i didnt reply him. He text me again asking why i didnt reply but i didnt answer him back . i reply all his text accept for this one. I am shock because this relationship is fairly new. We have been texing each other for a few days . he text me everyday but yesterday he didnt. i text a "morning greeting " to him today but i didnt get a reply?? We both are shy. i have never had a relationship before, Pls help? What are the possible reasons why he didnt reply me?