weird as this my sound - but cant men and women just be friends???

this guy and i have friends for a while now - just friends really, coffee, the odd email, forwarded mail etc....general chats about life, about families, advice on work, on friends, nothing on relationships or anything....we are work collegues - different branches...

all of a sudden yesterday he tells me "i think it is best we stop speaking to each other" please, please tell me you accept and respect my decision (which i tell him i do) on this. i will explain everything to tomorrow (being today) - i havent heard anything from him since....

i dont know what to make of it.....