What should i do between two sweet guy?

what should i do cuz there is two guys that loves meh n i'm not sure wat to do anymore cuz one of them is my bf n the other one is someone who i knoe...n he in love with meh...cuz he said that he wel do anything for meh if i'm his gf...n there is my boi is so sweet to meh...n now that the other guy came into my life...i started to like him...n somehow each day i daydream about him n not my boi friend anymore...so wat should i do....should i break up with my man n go with the other one or stay with my bf??