she got mad at me for roleplaying, because my character was dating someone.

she said im cheating and is very mad at me :/

might make a very lenghthy post about her, but right now i have no energy

Have you guys talked about it? And has she set prior boundaries with it? Because there is role-playing for more of a sexual need and maybe she was just upset because that's what she thought it was? Sitting down and talking might help :) With my partners we always talk through things and listen to both sides, taking into account how things make them feel and how they process things. Normally it ends up pretty well.