Which is the title of this movie:?

So the movie goes something like this- a high-school boy, who's the flirt of the how school falls in love with his new chemistry teacher.He doesn't actually love her, he's only interested in her sexually as he's the flirt of the school.She however refuses to have anything with him, so he starts blackmailing her and the action basically revolves around that.I think a watched the movie on Hallmark and if it helps I also remember that the teacher was with curly and the student with straight black hair, and was wearing a black leather jacket....