Promise Ring

Well i was wondering which finger to wear my promise ring on. My boyfriend got me one for our 1year anniversary and i always wore it on my left hand. Yeah, i alwayz got the "are you engaged" comment and i simply said NO, it`s not that i don`t want to, it`s that my boyfriend and i don`t want to be engaged for a long time, we was to graduate college first ( 2more yrs!). So about 2 weeks ago we got into an argument and well we made up and he gave me a BIGGER promise ring and we RE-Promised to each other (plus i got him a ring) well now i wear it on my right hand, i alwayz heard that if you wear a Diamond on your wedding finger it`s back luck... I want to know what u all think...