Some time ago I said to a coworker who I consider as a friend : 'I enjoy your company'. Another (younger, italian) coworker told me to be careful after I said to him 'she has such a soft voice'.
I really did not expect that reaction. To my feeling, no line got crossed and the fact that we are still friends and at times even share our thoughts about love and relationships in general, proves that we trust and respect each other.