If you are a senior in high school I assume you are over 18. If that is the case you do not need to tell you parents anything. True, you live in their house and have to abide by their rules but you also have a right to your privacy. If your mother asks be honest and tell her as much as you want her to know. If she does not ask you do not have to volunteer anything.

My parents were very strict and judgemental and believed they had the right to state their opinion regardless of how much it might hurt. At that time the legal age was still 21 so they could be involved in my life a little more. I watched my father spend 45 minutes berating my sister's one boyfriend after they met him for the first time. He was cruel and she was crushed. I vowed on that day that I would never give them a chance to do the same to me. As a result they did not meet any man I dated until we had set the wedding date. My mother was not happy we waited so long and I think she still blames my husband for the secrecy but it saved me a ton of heartache. I'm sure my parents would have broken us up. We have been married for over 35 years. It was a good match.

It is time for you to live your life and break away from your parents. Do it kindly and gradually. They will adjust and respect you in the end.