It's a tricky balancing act for T between being honest and being supportive. I'd like my T to read my mind and know which one I need at that moment.

I suspect what your T was trying to say was:

T: If I had no friends , no relationship and no job, I would find life very difficult. I can understand why people might feel sad and crushed and even suicidal in that situation.

She would then go on to say that you have many years ahead of you in which to find new friends, new relationships and a new job.

T: "You can be happy. I don't want you to throw that away. And I'm still here even if others have deserted you."