Most Helpful Guy
You may see many things that you like about him, but everything he knows and likes is going to be different from you, from music to hobbies. If you want to see him for a while, that is okay as long as both of you enjoy that, but I really recommend against thinking anything serious, because the age difference will kill it sooner or later.
Most Helpful Girl
If 17 is the legal age of consent where you live then technically it's not wrong, however, I would caution you to really think about it. Someone that much older, what could you possibly have in common? He's old enough to be your father. This could bring a lot of complications if you try to pursue anything.