Analysis of My Best and Only Friend

I really thought I loved her I thought she was the one, We used to have the best times most of it was fun, but I watched a change in her that I didn't like one bit, I tried to ignore it at first but it made me feel like shit, you see I don't keep a big crowd around me I'm more an introvert, I've just never really been able to myself assert, I guess can say I let this happen could have done more although I feel a tried to win the battle and the war, now I'm alone on my own and left to drone on about my woes, I feel that that is just the real world and how the story goes, she brought him in and started sin that struck me in my heart so I left I told sorry but I must dart, for what she had done to me cause in the end I could not fend her ending up with my supposed best and only friend.