How does Mercutio change Romeo's mind about going to the party?

Romeo is all sad about his unrequited love for Rosaline. Tybalt tells Romeo to "man up" and go to the party. He says if love is rough with him than he should be rough with love,

If love be rough with you, be rough with love;

Prick love for pricking, and you beat love down.

Give me a case to put my visage in:

A visor for a visor! what care I

What curious eye doth quote deformities?

Here are the beetle brows shall blush for me.

He says this is a masquerade ball so beauty does't count anyway!