This poem has many grammatical errors. I have edited the poem for you:

Why did you have to come into my life?

Why did you have to make my life better?

Why did you make me fall in love with you?

Why did you have to go and break my heart?

I love you, why did you break my heart and go?

You made me who I am and you left.

Why did you have come into my life?

It seems like English is your second language, and I hope my corrections will be useful to you. I hope you enjoy this form of expression, and this learning experience. Keep at it.