What does it mean to dream someone is trying to get into your house to sexually assault you?

Dreams deal in symbols and metaphors. In dreams, one's house represents one's life. Sexual assault suggests vulnerability, or violation of boundaries. So this dream could be about the fear (or intuition) that one is too vulnerable to outsiders, and better boundaries need to be established in one's life. Other details in the dream might provide further information as to how and where the dreamer is vulnerable.