Boyfriend might be going into CPS,what will happen? Can I do anything?

Well, he could probably get emancipated, which would mean he would be regarded as an adult, be able to move in with you and from there he would also be able to get an excellent financial aid package from fafsa so that he could go into college and get a proper education. If he does that, make sure to keep open communication with his sister to make sure she receives proper attention if needed.