Friend always competing with me?

Well firstly she doesn't sound like much of a "friend" so i would stop calling her that right now. Secondly losing your cool isn't a sign of weakness and if you think that then you are just as bad as her. Thirdly it doesn't matter if shes better than you at something and if your better than her at something, im sure you'd both trash me at running however that is my point, we are all different and we all have different skills, who gives a crap if shes better, just stop competing and humour her and she will stop getting the kick out of seeing you lose or seeing you try harder to beat her. This is really petty and needs resolving NOW.