Will he reciprocate?

I proposed a boy 4 months ago as i am madly in love with him. I couldn't tell him earlier since he was already in a relationship for two years with a girl but she left him for another guy. after 10 months of his breakup i have him a letter.. but he replied that he didn't want to be in a relationship with anyone right now.. but just a few days ago his ex has again started talking to him.. i got so much scared.. that I started crying.. he told me that nothing is there between them and they are talking normally.. when asked about my feelings he replied that it will take time.. what should I do?
Will he reciprocate?
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