I think it depends on how she (and you, for that matter) define severe.

And regardless, there's a lot of space between short term therapy and "always." Does it really sound likely that people fit into two such neat categories?

Everyone's guilty of black and white thinking sometimes, even supervisors!

Still, I don't know that your therapist is doing you any good at this point. Maybe he helped once, but that time seems to have passed.

ETA: If I want to keep going to therapy forever and I can afford it, I don't really think it's her place to say I shouldn't. It's paternalistic.