Nothing in Common with my Adopted Family

I know exactly how you feel. I always describe myself as the "black sheep" of the family. I always feel like I can't be myself around them. My abrothers and I all really have no relationship. I get along with my amom, but we don't have a bond. I can honestly say I do not feel love for her. I am supportive of her during a difficult personal time and care about her as a person. I primarily do it out of obligation rather than feeling the desire and want to. We are all pretty much emotionally isolated from each other. I am closer to my sister in laws than my own family and sometimes they are the first people I want to find out when something good happens. I hate that we are like this and that I feel the way that I do. But we can't really help that now can we? I'm just glad to know I'm not the only one with these kinds of issues.