I have a hard time opening up to people

ok this might not make a lot of sense idk but I have a hard time opening up to people and caring about others even my closest friends. like whenever a friend leaves me or stops talking to me even if its someone close I generally don't care, I don't care if people leave me or stop talking to me despite the fact that I really want to be able to have a close relationship with someone and sometimes I don't even notice that said friend isn't taking to me anymore. I find it hard to trust and care about others, even confiding to them about personal things is difficult. I don't have a hard time making friends or enjoy my time around them, but I have a hard time trusting them and seeing them as family or people I can tell anything. I also have a really hard time being attached or romantically interested in anyone, and when I do it doesnt take long for it to fade because they did something that angers or disappoints me I think maybe it has something to do with my home life or family but idk. does anyone else feel this way or