my brother & dad are both disabled in various ways

The times I've felt most different in my life have been the times I've had to cope with their problems, in addition to my own & I've felt like I can't talk about it with my friends to save them the worry I feel. Over the years the situation has come out bit by bit but its always a struggle trying to explain their multiple problems to someone new, especially as they are not physical, so to the rest of the world they look so normal.