People that don't naturally have respect for anything (they don't know the meaning of RESPECT) can't really get any enjoyment out of life "as it is". Because they can't enjoy life "as is", they have to constantly MAKE life meaningful to them by always causing some kind of "situation" (that is why people play games).
I'm not saying this is the case with your "someone", they may be playing the jealousy game repeatedly because they are not faithful to you (and it is a diversion tactic so that you don't catch on, this could be most likely). Either way, they are "playing" you (lack of respect,...to say the least).