What is wrong with this guy?

To give you some context. I’m an exchange student from Spain that arrived to the US 4 months ago. In my exchange program there’s a guy who always talks to me. He always mentions his son (let’s call his son Doug), who’s the same age as me, this guy is always telling me to introduce myself to his son in high school and maybe to be friends, he even wants take me with his family at some place with Doug. Doug is a very popular kid from my school (football player and very handsome). I’m friends with some of the girls that he’s friends with and we share a class together but Doug simply ignores me. He knows who I am but he never says hi to me; once, I was in the middle of the gym after cross country waiting for my ride to take me home, Doug went inside the gym from the football field and walked in front of me 10 feet with his face turned looking at the other side of the gym (it was so obvious that he was avoiding eye contact, it was weird). I couldn’t care less about not being friends with him, but Doug’s dad is always talking to me about doing things with Doug and being friends and stuff. Is there something wrong with Doug? Should I do something?
Update: By the way. I’m a guy, I’m friends with some of the girls that he’s friends with because I lived with one of them for 4 months (she was my first host family), so I’m pretty good friends with that girl in particular. She’s in his same group and she thinks that he is acting weird towards me too.