I have a colleague that is always very nice and helpful to me. We work in different locations and he always goe out of his way to personally deliver things to my location. Whenever we see each other he always stares into my eyes. He tells me to call him if I need anything or just to talk says if I ever want him to stop by all I have to do is call. Every time he sees me he lets me know he is single and share personal things about himself and want to what's going on with me. Is he just being polite or is it something else?