Asked for phone number, lost interest?

A guy at this coffee shop was chasing me quite hard and was really nice to me. I gave him a letter thanking him for all his generosity , asking him if he's free anytime we can hang out. He then asked for my number twice in the span of 5 minutes. I gave it to him but he didn't text that day. The next day, he gave me free stuff and came over and said he will text but didn't text. Now his attitude has changed, neither he pays any attention to me nor he's being nice. All he doss now is say hello and how are you. But nothing more than that.

What did I do? He's acting like I gave him a fake number or treated him badly. I feel so miserable. Is he playing games or he's just lost interest in me due to me being from a different country and my number has that or he has too many insecurities?
Asked for phone number, lost interest?
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