Thoughts/Ramblings

First, this probably shouldn't be posted here, but I'm an avid lurker of this forum (especially the mtt board) so here is where i posted it. Anyways, I'm a relative newcomer to poker. I'm only 17 and I've been playing for about 2 years. I've had decent success live with a net profit of about $800 last summer playing $.25/50 NL holdem (mostly holdem, sometimes a mixed game) with a bunch of college guys. Anyways, I put $50 on a stars account about a month ago and in about 2 weeks I had built my bankroll to $250 playing $5 sng's. However, in the last week I've lost $200 and am back to my original $50. This can mostly be attributed to playing tournaments out of my bankroll. My question is even though I know proper bankroll management (tournaments 1-2% of roll) why do I find it hard to play within my bankroll? I'm generally very frugal with my money, but it just seems like the tournaments scream my name. Anyways, any questions, comments, advice would be appreciated. Also, I'm trying to have a bankroll of at least $1,000 before I enter college next fall(hopefully Vanderbilt) and would also appreciate advice on game selection. Thanks for listening.