What can I do if I want a teacher to leave me alone?

Don't say anything, but try not to pay any attention to her. If she comes near you or looks at you, try to act in an uncomfortable way and she'll get the picture. If she asks you about it, just quickly say nothing in an abrupt "im trying to get out of this convo " manner, give the uncomfortable look, and turn away. If she persists, you may want to talk to her (gently) about it.