You (Skateboard) have been pretty close with Slingshot. He was acting differently though. He had to have a person with him if he wanted to do anything. He couldn't sleep alone, he couldn't write his homework alone, etc. But you helped him everytime. He is very grateful for you and tries everything to keep close contact with you.
One day, he just barged in your room and asked if you could play games with him.  He likes you romantically, but you don't know it and just think it's platonic.