Feeling like an alien

Does anyone else get the feeling they they are literally from another planet , particularly since my diagnosis 3 yrs ago , I guess I just used to keep going but and things have happened in life trauma etc I just feel like I don't fit in any longer,  I can't understand people and why they say and do what they do most of the time . Naturally I'm an introvert anyway,  life recently is a complete engima to me , I wonder if it will improve ever or I will always feel this way,  it doesn't win me any friends and can frustrate my wife at times because she does need other people in her life as maybe I should as well but the older I get the less I care , to me it is trival and much prefer the company of my Cats and Dogs,  I understand their behaviour. I would welcome and further insights on this please.