I must, i need, / i have to?

In life, in order to gain something i will have to lose something. 

Now i gained something, i think it's time for me to sacrifice something. 

That something that i am hesitating now to giveup on. 

The thing is, i promised my mum, i prayed & make this promise to god. 

Promise isn't meant to be broken to me. 

People must understand, how i feel now. I got really no choice at all. 

I am sad, i am indeed very sad now. I should be happy now but y'know..

I hate people who break promises, so i shouldn't right?