Terrible love clash

Boy:I have say love and do many things for you about 3 months.

why you didnt accept me and ignore me?

i dont have any hope for life only you.

Girl:I have told you that i take you as friend. Also i have boyfriend in another city.

Boy: Your heart as stone. No one can save you. I curse you to die. bcz you are not worthy anyone to love.I will ruin you if i cant get you.

Girl:Why you  treat me like this,i will never forgive you.You are a ghost for me.

The girl blocked the boy but she feel angry and sad.

At deep night after 2 days.The boy use different phone number to give the girl a call and call her name. He Feels regret to hurt the girl.

Girl: Only one situation you can message me. If you will die tomorrow i will reply you, bcz i will give my mecy to a death man.

Boy:I will shoot to myself. You know i have gun in my hand. Do you want to kill me?

The girl keep silent and dont want to answer him. After 30 minutes she hear a report of a gun. The crazy boy fall into a  pool of blood.

What happened can you guess?