Vítor, be happy is something anyone wants. The thing is that hapinness is a aware state, is being present, is having fun, is being greatiful, being the best version of ourselves. It is not related to something that comes from the exterior. Something like I will be happy when this thing or that thing happens. Be happy today, with all the great things you have in life!
But you have to take care, don't let anyone who is sad to make you sad.
Being happy is seeing magic in our daily lifes, when you sing in the shower, when you play with friends or when you make a tour.
Wish you be happy everyday, everywhere, in every human interaction. Being happy is making others happy. It is just good energy, good vibes!