In Writing the Breakout Novel: The Workbook, Donald Maass has an exercise on page 24 about creating inner conflict, which basically involves considering the tension about what the character wants and then thinking of the opposite of that. Note that since Maass requested that I not write out the exercises, I will just apply it to my own work right away rather than posting on two separate occasions.
I am switching now to my young adult mystery paranormal, TIME WITCH. The main character Eve wants Chase, a popular boy, and they are about to start high school together. But she also wants him dead because he made out with her and then appeared to ignore her; he is now responding to the attention of a popular girl. This inner conflict will be the combustion that triggers her witch powers. One of the ways she realizes her powers is when she harms him when she sees him with the popular girl one night. She stops short of really hurting him, although she could.