I dont know what to do with my Fiancee,shes getting angry with me...?

I was 2gether joking and playing with my intimate friend in my room, suddenly, my girl friend called me on phone to come and meet her outside the gate where she stays. I asked my friend to xcused me to go and see that my girlfriend outside there (outside the gate of my house,she doenst was to enter). I met her outside and we just discussed a little thing that is meaningless to me, after 10mins,I told her that i left my friend inside my room, so she should please giv me some minutes to attended and see my friend off.
She got angry when i said that,she said,"I dont really care for her,i valued my friend more than her,she says many things but i insisted of going to see my friend and promised her to come back to meet her after some minutes.I told her am going,she didnt answer me. Hence i went away.
After 20mins my friend leave me,I called her on phone to ask her where she is,she insulted me on phone claiming that i love my friend more than her,now shes annoying with me, wat do i do pls

well, you should call your fiance immediately and work out the fiasco that you are facing now. or give her time to cool off and hope that she forgives you for hurting her feelings and trust in you.

Remember, there are always plenty of other women out there.

If you were being intimate with the other girl in your room and your girlfriend came over, that is a big problem. I think you should decide which one you want to date and dump the other one. It is the only right thing to do. Put yourself in her place. How would you feel if she was in her room with another guy and you came over? Would you be happy about that? I don't think so.