I'm sorry. Do you still live at home with them? (I'm assuming you do)

Perhaps this is something that you can tell to another family member or close friend? That way, they can be there if you choose to confront them? Otherwise, what about writing a letter? Letters aren't as confrontational, and they COULD always choose to ignore it and not respond in any way - but if they care about you, then I'd hope they would explain themselves and their actions which are clearly hurting you.