@UIP:

I believe it when you say that there is such a thing as imposing a person on another person but an example that comes to my mind is if someone imposes a person on you who you don't relate to and/or don't get along with, it could mean that that individual(s) is or is attempting to make you befriend or socialize and/or be "exceptionally" nice to the person who you don't relate to and/or don't get along with even though you may refuse to befriend or socialize and/or be "exceptionally" nice to that particular person.