Wtf is wrong with me?

Why do I empathize more with animals than humans? The only person I care about is my little brother. I do a lot of good things for people and im friendly but I feel like its all fake and calculated sub conscienciously for my own benefit. I know im selfish, I know its wrong I sometimes try not to be. Everything I do for myself or others is all for me. I care more about what people think of me than I do about their feelings. I have anxiety and it comes and goes. I dont want to be this way. People say accept who you are but I dont want to accept an a**hole. If I do something nice for someone like a friend I feel no joy in it. In school I could make many friends but no close long term friends nor did any group seem interesting. Im not a loner by any means im just sharing a cynical view and only the negative because were all here to vent. I would like to think im not always like this but I am never truly this honest with myself or maybe im overthinking. I was feeling guilty about something which spurred me to write this. Sorry if the spelling or grammar is bad its my second time writting this on a phone with autocorrect turned off. Thanks for reading.

Hi,
Cant say for sure what is wrong with you, but you felt guilt so you do have it in you, i dont have any advice really coz im the complete opposite i feel every emotion on the planet (practically) not literally.

have you been an talked to a Doctor?
i know its the "typical" sentence, but many times it can only be sorted when you can "rule some things out"