Yes, this is a form of sexual assault, morally if not legally.
The law may not be able to prosecute it as a sexual assault, but there is no question that it was a physical assault.
I see no reason why you shouldn’t tell your parents and the police. You were physically forced against your will.
Hopefully the authorities in your locale will take this on to prosecution so that it may spare some other future victim.
Someone needs to jerk a knot in this idiots tail. If the law won’t act, then your parents should contact his and threaten a civil lawsuit.
This goes way beyond “boys will be boys” type of nonsense. He needs to learn asap that this won’t be tolerated. Make as big a stink about it as possible with the authorities, his parents and even the school.
You did absolutely nothing wrong. At the very least, you and your parents have firm grounds for a civil lawsuit. And I hope the authorities nail him for a physical assault because that is exactly what it was.
By speaking out now and loud and clear, you may very well protect both yourself and other women from being victimized by date rape. This character has all the earmarks of someone who might do that in the future because he has no respect for others.
This will also put other guys on notice that you are not someone who will tolerate being disrespected and taken advantage of.
We teach people how to treat us and it’s sending out a bad signal to this guy and others like him if you don’t protest as forcefully as possible.
YOU HAVE NOTHING TO FEEL SHAME ABOUT. YOU DID NOTHING WRONG.
Trust me when I say that any lingering doubts about that will fade away as you stand up for your rights not to be physically overpowered and molested.
You need to do this for your own sake. And he needs to be taught how to respect others.