Well, while the phrase "therapeutic love" is utterly ridiculous I think (dude, whatever!), I get the gist of it. I think your therapist was trying to provide a potentially safer context in which to describe the consistency of feeling he has for you.

As much as it may be hard to deal with (and damn can it be hard to deal with), the love that exists in the therapeutic frame is born out of that context - and not the mutual kind of love we are entitled to outside of therapy. THAT kind of love, however, has the real possibility of doing real harm.

I love my therapist. He loves me, but if he had ever said "I love you" I might have just totally freaked out. OR taken love to mean something different and run miles upon miles in a very counter productive direction.

I think he is keeping himself, not separate, but benign.