Is it that he doesn't want to be my friend anymore?

i knew a guy thru online,i met him too,he never misbehaved.He is a good person,as far as i know him.He discusses abt his personal life with me and i helped him financially too when in need.I supported him in his way..but there's a drastic change in this guys behaviour for no reason,it's been many months i didn't hear from him and no response to my mails too..and we both know each other's mail pwords too.I just checked his mails and found that all of my mails were read till date n no reply given to it and he always says i am more than a friend to him and helped him..how can he do this...is it that he doesn't want to be my friend anymore