That and hopefully you have a witness and he doesn't try and say you hit him. Some states have laws that give percents of fault. If he says you sped up and hit him when he was trying to come over it's his word against yours unless there is a witness that says he was driving aggressively and hit you. Either way your truck will get fixed.
Hope it works out to your benefit.
Sorry man it's always heart breaking.
Also if the truck has never had an accident look into diminished value. Insurance now has to pay you out for the loss of resale value due to an accident. You can only do this once and only on the first reported accident.