ring ring

so i just finished Eco-Chic Weddings, and its made me think, do i really need another band on my finger when i get married? or will my engagement one be enough? the boyf is undecided and to be honest so am i, but it would keep costs down and it would mean my engagement ring means ten times as much as it does not, and right now it means ALOT to me. i dont need another band. do i?