I think it's grandiose to assume to know the motivations of strangers for sure. She can speculate but there is no certainty.

I understand how it feels to have many of the people in your life lie to you. It has happened to me. There is no telling why people don't include you. I'm sorry your life has not improved over the years. You've unfortunately met many unsupportive people. I wish I could offer you more but if your T says she thinks people care about you maybe its because SHE cares about you and wants to be there for you. Maybe that's just her round about way of conveying HER feelings. I agree that she couldn't possibly know how other people in your life feel about you. It sounds like she is trying to make you feel better because SHE cares. I hope that is the case. I hope your T cares and wants to be there for you. I hope you can find other people who will care about you.