SO family affecting relationships, despite his feeling.

My boyfriend sister's don't like me because of my race, I'm black and I'm proud. His dad doesn't like because I have diabetes and his brother's wife has the same disease but she doesn't take of herself. He feels as if his son will end up in the same situation that his brother is going through. Despite the fact that I take care of myself, exercise and manage my disease. His mom has never me due to living in a different state and doesn't actually know me. I love my boyfriend (22) and his family knows. I (20) have goals I want to reach in life but my boyfriend takes care his father(60) who is disabled and mentally handicapped. His grandparents are in their late 70's early 80's and flat out told me that he's not going to have a 'normal life' because he has to take of his dad until he dies and they are done dealing with the stress of it all.

Him and I have talked about eventually getting married and starting a family but that's impossible with the situation he's in. I feel as if I'm wasting my time knowing all of this information. Yeah I hope things change but a part of me knows that it's not going to. His dad is missing a chunk of his brain and has zero reasoning skills. You can't explain things to him, he also has HEP C and is missing more than half of his liver. Since we've been dating I've tried to deal with him and his outbursts or rage and nonsense (his dad). His sister's who basically hate me randomly pop up and try to kick me out despite not giving a heads up that they are coming over. (Ones 96 miles away and the other two are in New York.)

I want to go back to college, get my degree make more that a dollar and twenty five cents above minimum working a shit job while his business is barely doing enough to keep him afloat for a month. He has zero plans on going to college, getting his own place (which he can't due to the situation he's in) or getting the credentials to get his business off the ground.

I've invested so much time in this relationship compromising and trying to make things work but every now and then I just feel like walking away. Yes I know I'm young but all the time and energy that I've waisted I feel wouldn't be worth giving on. I need opinions.