Why is my boyfriend treated badly by his family when he just wants help to get an engagement ring?

From what you said his parents do not like him.Prove to them yo do not need them and move out very far away from them.Easy.You are both young and able trust me you will make it.You do not have to be sad just remind yourself your boyfriend is only yours and do not forget to remind him every so often how for you he is the whole world.Will make you two much closer than before and he would feel so much better.As for his parents I am guessing thats why we have a middle finger?