Why should I trust her ?

Because of bestfriend :

Saya tinggalkan my beloved boyfriend and let my heart to be hurt asalkan bestfriend saya happy. I let my tears to roll down every night just because I have broke someone's heart without reasons. I give a fake smile to my bestfriend asalkan dia tak tahu yang my heart was too pain because I need to durable the missing of someone who helps me a lot to live in this life. And now, I regret it. I tought I was stronger but Im not at all. I tried to be stronger but I cant.