They think you'll be alright, but when it comes to Calib, he'll never do those things. I'm not saying ignoring you is right, merely pointing out their side. It's not fair, but life often isn't. However, you have found Susan and her family. Though they can't replace the family you have, they sound like good friends.
Good friends are hard to come by.
In fact they're downright rare. As to Calib caring less, he has feelings and needs too. You might want to talk to a school counsellor about what you're going through at home. They might be able to sit down with you and help you understand better what your parents are going through. They may be able to sit your parents down and explain your situation to them.