Downward Spiral!

[JDMcNugent7]

Im just 18 and i guess too inexperienced or mature to understand i have Limits i need to stick with. I fully know the consequences of playing out of them but i do anyway. For example, I had just $170 left on my pokerstars account, and started playing $3/$6 cash games, where the minimum buy in is 120. I know its stupid and that i shouldnt be there but i go anyway. I am honestly a Good Solid Poker player but i lose because of the limits i play in accordance to my bankroll. In home games where my friends dont want to play for that much i win ALL THE TIME and when i play the .25/.50 tables i also Consistently win on pokerstars. But i sit at the $3/6 table and i can make $100 in 1 hand. Or Lose $100 in one hand. I cant get away from it.

I would have made such a bigger profit if i just wasnt like this but i cant help it. I really need suggestions. DO i just quit cuz im out of control ?
I just cant seem to play for little money.
I dont want to quit, but maybe i should?
please offer any suggestions cuz im screwed up right now, and yes, this is all coming about cuz i lost all my money in one night tonight.