I could see how you could do extreme things for the person you loved. Adam One said that when you loved a person, that love might not always get returned the way you wanted, but it was a good thing anyway because love went out all around you like an energy wave, and a creature you didn't know would be helped by it.
I enjoyed teaching. I liked the students. Having to formulate my ideas about literature made them clearer. I did not particularly enjoy the more bureaucratic aspects of the job. However, if you are teaching fervently, your energy and time are used up at a great rate.