You really shouldn’t have to lie to your parents. However, it also depends on your age. I’m not in high school, I have been out of my parents house for 5 years…if my mum asks what I was up to last night I can say “stuff” if I don’t feel like answering, but if you’re 16 and they ask where you were last night…you tell them. I’m not “old”, I just respect my parents and know that lying to them isn’t the answer. If you have the type of relationship that you feel you can’t be honest with them than you either need to re-evaluate the actions you feel you need to hide or you need to re-evaluate the relationship and see what needs to be fixed so that there can be open and honest conversation between you. It will be the best thing you can do in the long run.