WHAT DO I DO? WHAT DOES HE MEAN? SOS HELP?

So this guy and I have been talking everyday. our phone conversations can last from an hour to 7 hours. One night he randomly told me he was crushing on me and really liked me. It was weird because it was out of the blue. He told me that he had thought about it for a couple days and decided to tell me how he felt, but now it seems different to me. He is like not texting as much and does not seem that interested anymore. What does that mean?
WHAT DO I DO? WHAT DOES HE MEAN? SOS HELP?
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