My family wont give my boyfriend a chance and say that they will disown me if i stay with him but i love him and he is a great guy what should i do?

Well if you are financially and mentally (some people can't do without family) capable of starting your own life, then forget what they say. If you try and fail to convince them that they have to be nice to him coz he's a part of your life and that they should respect him because you love him, then you basically have two options, its the guy or the family. I think your case you'd go for the family.