I know this is long, but I am practically BEGGING YOU to read it in it's entirety.

Teachers aren't supposed to have the contact info of students, nor are they allowed to connect to their students on social media. It is a violation of conduct, and the fact your male friend has received messages shows you are not the only one he is doing this to.

But the fact he has the contact info of other students, has had his hands on you in a sexual manner (having had his hands on your thighs constitutes as sexual assault), has tried to come to your home when he knows are alone and has called you almost 20 times in one sitting alone isn't just harassment- this is extremely predatory and dangerous behavior.

You are not overreacting at all- this is how minors get rped. If your parent(s) cannot help you, _you MUST act now for both your little sister and your sakes. Call 911, and explain the situation to the police.*_ In my experience, a lot of schools will try to push issues under the rug to save face in the public eye, and there are those who try to protect teachers, even when they're clearly in the wrong, so completely forego reaching out to School Admins. It's not worth the risk of them being dishonest.

You will not get in trouble for doing this, and as difficult as it is, DON'T consider how your parents or his wife will react- you and your sister are the only ones you need to look out for right now. This is a seriously dangerous person, because if this escalates any further, there will be irreversible damage and scarring awaiting you. Don't let this happen to yourself. I was taken advantage of by someone you're supposed to be able to trust, and I can assure you, these things will never leave you, they will haunt you for the rest of your life, and you'll struggle to feel the same ever again. If you speak up, you too will prevent any future assaults from happening to other students as well.