I'm going to force my 15y old son into doing track
What happens if he refuses to do track?
I will put him into a boarding school.
Has your son expressed interest in track or other sports? You shouldn't be forcing him if he's not interested. Find out what he likes to do and help him pursue it, it will be happier for both of you.
He is my kid and I'm his father.
I get that, but that is no reason to force him to do something that he is not interested in. I know you want the best for him, but you should work with him to find something that he is interested in instead.