Student Exchange Programs

I have a major crush on this a boy in my school and he rides my bus but I can’t tell if he likes me. When he gets on the bus he almost always looks at me, and in the morning before school starts I caught him staring at me, but I just don’t think he likes me. I’ve talked to him a couple times and he is so nice and funny. I want to know how to get closer to him. In class he is in my group but I don’t really talk to him that much b/c im to shy. He is quiet too. My other friends that are in my group have no idea that I like him. I don’t know what to do. He’s an exchange student and he will be leaving after school is over so I only have a couple weeks left to make my move. Please don’t tell me to “just talk to him” I’ve done that and I don’t really know what to say besides the questions he’s been asked a 100 times before like “So do you like it here?” and stuff. Help me please? Thank you.
I don’t want to make it obvious that I like him. I want to know for sure that he likes me before I show him how much I like him. I’ve liked him for 9 months. I’ve had multiple people tell me that I should date him b/c we would make a cute couple.