G'day idontknow, personally i have not had your experiences, but i would not give up writing if this man is important to you. Who knows where his mind is at this point in time, what emotions he is feeling etc if any. Like FGC said, many become insecure and go silent. Some test to see how important they really are to you. Sometimes people put walls up, not to keep you out, but for self preservation and to see what you are willing to do to get through those same barriers.

I can share about one friend, he cut himself off from the outside world when the pain was too great, and things inside were unbearable for him. He felt like he needed to shut down. He accepted no visits, returned no mail and tried to deal with life behind the walls as best as he could.

I would send a card, letting him know he is in your thoughts, and i would continue to do this once a week for as long as it took, but that is me. Hopefully, he is the real deal and is just coming to terms with all that has been shared and you will hear from him soon.

I know how worrying it can be not hearing, so i sincerely hope for the both of you he will contact you soon, if only to say goodbye. Take care.

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If you are compassionate in your approach to all tasks in life, believing that all "problems" contain valuable lessons, you will find peace of mind.
~Dr. Lee Jampolsky