Abandoned

Lots of problems... I got kicked out of my parents house, lost the car, was homeless for about three weeks... and moved into an apartment with my boyfriend after a month of saving (with no shower, food, bed, laundry, etc). After only four days of living together, he packed up all his junk and walked out on me. I wasn't so upset that I lost him as much as I lost my roommate. The day it happened, I told a friend who immediately offered to move in with me (and drag her husband along) to help with rent and to keep me company. Not a week after my boyfriend left, he apologized and wanted to know if I wanted to continue the relationship (and hinted that he wanted to move back in). My gut and all my friends and family tell me that letting him back in would be a bad idea, given his track record of jumping up and running away when he gets stressed (apparently his ex girlfriend came back into the picture and he didn't want to 'put me through that', but at the same time was willing to let me stay alone and try to afford this place on my own crappy paycheck).

My heart is torn on whether to let him back or not. My new roommates have never met him but from what they've heard about him, they do NOT like him, but they wouldn't stop me from making my own decisions. I need the extra money and I'd love the company, but it's a tough decision I apparently have to make tonight. Help?