how long to stay

Hello!
I am 23 years old and wantin to go to Puerto vallerta with my 4 girl friends this summer....how long should we plan on staying?
is a week ample time ? or do we need more? less?

Hello!!...When I went to Puerto Vallarta last year I went for 2 weeks, and it seemed like a long time, this year I only went for one and it went by so fast!!! If I were you I would try to go for at least 10 days, or 2 weeks!! and if you do only go for a week, savor everyday!!!