What does it mean when a guy tells you "no one deserves you"?

I've been best friends with this guy for about 10 years. We have always just been friends. recently, however, things seem to have changed. He is currently living out of the country and so we have been corresponding via letters. In his last letter, he told me that he knew no man who was good enough for me. He wrote that there were very few men who deserved me. He continued to explain that he was completley finished with his old girlfriend. Are his words about no one deserving me those of a friend or something else? I'm trying to decide if there is more to our relationship than platonic bffs.
What does it mean when a guy tells you "no one deserves you"?
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