Kind, collected, trusts anyone easily even when he knows he'll be betrayed later, genuine, values his friends, cares deeply. However, also uninterested in romance, doesn't see himself settling down with a woman, never been with women (eventhough good-looking), has genuine principles, doesn't like drama and often shifts to jokes when it all becomes serious, very unaware of his own feelings, a virgin, physically strong but emotionally weak. Again, very unaware of his own feelings. 

a guy who doesn't know he has feelings for you

a happy-go-lucky guy friend that is a safe place for her rants but doesn't see her as a woman

your best friend who has a dog named after you

I am approachable, kind, and considerate. I love sharing knowledge to other people. 

a university instructor

Nanami is just a normal man weighed down by the mundane day-to-day practices of life that stole his youth from him.