I feel like I have been abandoning my family?

I haven't been spending much time with my family lately. I'm 12, the youngest of four, and my three older siblings are all out of high school and out of the house. And I kep feeling like I've been abandoning my parents, becuase I'm in middle school now and a lot more stuff has been going on. They're getting kinda.. older.. and I don't want to make them do too much stuff that will tire them out. But I always just dump this stuff on them and I kind of just expect them to help me with it. But it makes me feel so bad because I don't want to make my parents do stuff. I want to spend more time with them. But see, tomorrow there is an overnight thing going on at the school, and my mom has been working around the house all week so she's tired, and my did might have to work tomorrow night and I don't want to have to leave her all alone. I don't know what to do I just feel like I have been abandoning my family and I really need help so please please help me. What am I supposed to do?