Give me a case to put my visage in. A visor for a visor."(Pg.43, line 27-30) He is telling Romeo to not be sad about his love interest, Rosaline, but if love has hurt him then hurt it back. He tells him to get out of the sad mood and put on a happy face for the world because Rosaline's love isn't that important. He doesn't even care that Romeo loves her, but love has hurt him so he must hurt love. Hurting something is physical, and his feelings of love are once again coming from his body actions, not his heart.
To Benvolio love has no real depth. He believes people fall in and out of love very fast and it just doesn't mean that much in his life. When he is giving Romeo advice not to be so upset about Rosaline he says, " Alas that love, so gentle in his view, should be so tyrannous and rough in proof!"(Pg.21, line 174-175) He is telling Romeo that love seemed so innocent at first but then you realize from experience it is rough and very controlling at times. He is proving to Romeo that maybe if he didn't pay so much attention to it, it couldn't hurt him so much. Romeo has now experienced how love is not always a happy thing and it can hurt him too.
Another time that Benvolio shows that love doesn't mean that much to him is when he says,.
" Tut man, one fire burns out another's burning; One pain is lessened by another's anguish. Turn giddy, and be helped by backward turning. One desperate grief cures with another's languish. Take thou some new infection to thy eye, and the rank poison of the old will die." (Pg.29, line 47-52) .
Benvolio is telling Romeo once again to forget about Rosaline but he uses examples to explain, that to feel better you make someone feel worse. He means that Romeo should make himself feel better by going out and looking for someone new at the masque and have fun, then Rosaline will be unhappy because she lost Romeo.