My brother and I used to be really close as kids. He used to consider me his best friend. As he got older though, he started acting cold and resentful for petty shit with how he was treated in the family--innocent childhood pranks, being a worse student, getting into trouble more and getting punished for it, etc. Stuff that every kid goes through suddenly became a big deal to him and he primarily blamed me for it.
Years pass and he's in college now, living his life. The only difference is that he wants nothing to do with me even though I have never done anything other than be a protective, supportive sibling. He never calls Mom. He rolls his eyes and acts resentful whenever Dad points out that they postponed their retirement to pay for his schooling. He acts huffy whenever me or my parents call to check in on him. He basically wants nothing to do with us.
We're supposed to be visiting my 90 year old grandpa in a few weeks for spring break. Bro doesn't want to go and openly says he'd rather just go camping with his friends. Grandpa might not even be around next year but he doesn't seem to care. It's sad and frustrating and it's kind of tearing me up inside because I remember what a sweet, funny kid he used to be and how we used to always be there for each other. During the year I was suicidal, he was never there for me. He didn't even know. And I haven't forgotten that for a moment.
I hope it's just a selfish young adult phase and that he'll grow out of it. But it makes me really sad to see how far apart we've grown from each other. I want him to happily live his own life. But I just want to be part of it somehow. He's my brother.