I will and i won't

A friend told me to pursue what i want.

If you know that there won't be any happiness at the end, how i can pursue what i want? If you know that you are the only one who is putting the efforts, how i can pursue what i want?

I will learn to put on a mask. A mask to hide my emotions.

I will imprison all my passion, as you will not cherish.

I won't think of you anymore, as you are not thinking of me...