Is a 146cm snowboard too small for me?

I'm 5'6 and weigh 145. I"ve been snowboarding for 5 years now and I'm going into the parks more. I just bought a new board (the Rome lo-fi 146 cm board). It's really flexible and I was just wondering if it would have a higher chance of breaking because of my weight, although the guy at the store said this board was awesome but he never asked me my weight.