Love is a human emotion and if my therapist told me "I love you" directly, yes, I would say it in return. But as it is, he's told me something like "I love you" twice but indirectly, as if he meant to let me know but was afraid of the words (which I totally understand, given the nature of the therapeutic relationship) and I'm not going to say it to him any more directly than he does to me. But we do definitely feel love for each other, I have no doubt about that. I wouldn't say it back if he told me he loved me and I didn't love him too.