Why would he block me if he really liked me?

cutepuchi
I met this Guy through a friend last year, he seemed very interested in me by the way he called me every day n i just ignored him then since i was alreading dating. Now after a year when m single i tried to contact him n even he responded well , he said he was single and we started talking over the phone every day about 3 hours.He said he is attracted and also would send me romantic messages. This went on for a week and suddenly he deleted me from his Facebook and blocked me as well. I didn't contact him since then, never even asked him why he did that. I was too angry but I really wonder why would anyone do that.
Why would he block me if he really liked me?
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