Please help with my bankroll ignorance!!!

Ok I started on partypoker last fall with an initial deposit of 50. I mostly played sng starting with 5+1 and working my way up to 200+15 within 2 months. I really had a knack for the sngs. I had build a bank roll of about 20k and was doing great in the 215s. Then i tried the step 5s and got cleaned out by christmas. I lost it all, and i was in about a day or 2 that i blew in all in these steps 5s. I was definetly not ready for the step 5s and also alot of bad luck also insued. So i started back after christmas break im in college so i only play at school really. But after playin so high limit then losing it all i dont know how to build back a bank roll because i cant get myself to play anything below 50s. So for spring i would lose thosands and then remake the money in a frenzied scramble to make back the money i had overdrawn my bank. For example, I would have 500 in checking and 2k in savings and would drain both accounts plus 2k and then would have to play all day long the next day in 215s to make back the money. Yet i always seemed to make back the money i realized this was awful money management. So for the summer i put a 200 a week limit on my partypoker account. I havnt played very consistently and will only play 50 sng at the lowest as i cant get myself to play lower. I also have a problem of losing all my money in ring games as im a terrible ring game player yet cant resist (I probably lost a lot of the 20k in ring games as well). I am fairly consistent at the 50s but tend to end up turning the 200 into like 600 then losing in all in some form be it in ring games or going to high sngs. The big loss before christmas break really demolished my confidence in poker i think and i need a plan how to get back on. I used to play just for fun and found a knack for the game, now i want to get back to the good old days. I need suggestions in what i need to do. I really havnt lost any money but havnt gained any either because whenever i win i play til i lose it all. Please give me any suggestions how to manage this bank roll and become a more successful player. If anyone has had similar situations please share and tell me what i need to do. Something snapped in me tonight and made me realize the way im playing is ridiculous. Please Please Please Help me with any suggestions you have to give. Anything can help.
Thank you so much,
Zach
P.S.-(sorry for the poker sap story as im sure everyone has them but i just needed to get all that off my chest and now im all ears on any suggestions to help me back on the road to poker success)