dude, she's trying to tell you to get a longer one because in the long run it'll be a better fit for you. Yah, a 146 may be good now, but next year it'll probably be way too short. When I was 13 I went from 5'2 115lbs to 5'8 140lbs by the time I was 14. You're going to grow a lot in one year, let alone two. So maybe a 152ish might feel a little long now, but next year it'll be perfect and will last you a few years. If you don't have a problem with money, then I'd say go ahead and get the 146 for this year and buy a new board next year.