I think that family is less important than your mate. There will always be ties with your family, but at some point the focus should be on your mate, since you will spend your life with them. Giving priority to friends and family early in a relationship may make sense until the point where you have decided that he/she is the right person for you.
Parents and siblings are critical to children, but when you grow up, their role becomes secondary. A parent's responsibility to their children is significant, but even then, I think the priority relationship in a nuclear family (whether traditional or otherwise) is for the relationship with the person you plan to spend the rest of your life with (i.e. partner/spouse). Likewise, if you feel a stronger need to make friends happy than your partner, you have possibly picked the wrong mate or have skewed priorities.
However, with that said, early in a relationship, I think it is critical to consider what your friends and family think, because they may be able to see things worth considering that aren't clouded by hormonal influences. But if after you have taken the time to determine that this person is the one for you, they should be your priority.
Just so that it is clear, I am not advocating a relationship where you spend no time with anyone else, nor that you should support everything your partner says or does blindly... I just suggest setting priorities appropriately.