Should i ask her what happen or leave everything as they are?

We have been friends for three yrs but recently we were joined by this new colleague who really looked desperate for a friend we welcomed her into our office and she started going with my friend to the field but whatever used to happen there she would rush and tell me but my friend would never tell me and i would not ask her. so after a period of 1 month she stopped talking to me and became close and a good friend to this new colleague, i kept a low profile and thought that with time should would tell me what happened but instead they opened war against me and started using insults towards me and calling me name. i thought of informing my Boss but i realise it was useless because he is having unfair with this new colleague who came btn me and my friends. she calls me the company house girl because i clean the office and even insults me that the job i do is for p'ple who never went to school. Might she be jealousy of me because even if i clean the office am stable marriage, a better home which she visited recently with 2 kids,i drive and for her she is not married, she dates married men and they are always dumping her, has 1 room where she stays and does not own car? Is this why she is trying to frustrate me to the extent of turning my friend against me? Hey to tell you the truth i have been tolerant with this old friend of mine coz her behaviors were not the best and the past may be it was God's plan i console my self. I need advise please.