Well, first off, you did do quite a lot to get yourself in that situation.
ONE: you slept with your coach's son.
TWO: he's 19 and you're 16.
THREE: your coach caught you guys having sex in HIS room, how do you think that makes him feel?
FOUR: your coach has every right to be livid.
If you love soccer --- you're not going to get better plays on this team. That's guaranteed. Better luck joining a different team under a different coach. You just BURNED your bridge(s).
As for the love of your life? I don't know how much this guy loves you --- if you guys had to have sex in his parents' room under his parents' roof. That's just not very wise, to say the least. You got caught, then you got your arm broken after the incident. Maybe, just MAYBE you're being told something... about life.
IF your love is true, you don't need to be in so much pain --- physically as well as emotionally.
Think of yourself --- and think of those lives you're affecting. Then weigh the consequences you've already faced and will be facing if you continue in the same pattern that you are.
G'luck!