No, I haven't, and I wouldn't. Nor would I say it to my friends, except to a couple of very close friends who are Americans.

Whether it is appropriate to say that you love somebody who is not in your family is different between languages (the word for "love" in my native language is never used with friends, for instance) but, in English, it also varies between cultures. So please don't judge other posters here based on whether they think it is appropriate (or inappropriate) to say that they love their T.