Would this be a smart decision?

I am in a joint bank account with my ex boyfriend. We have never had an issues over money. He is in the military and of course he makes more money than me so he helps me pay my bills in my apartment. I can see that I am beconing a burden on him and I just want to get out of the account. I have equal rights to remove myself from his account if I choose to...I have always been afraid to remove myself because I barely make enough money to handle my expenses. After paying all my necessities I would only have $53 left for gas and none of that includes food. I just got a brand new car in december of 2013 and my car note went up by $80. I only signed for the car because he said he would help me and that I deserved it. Now because of expenses. I am beginning to regret signing for the car. If I take myself off the account I do run the risk of losing everything if I am not careful with money. But being a huge burden on someone is not worth it. So if I removed myself and tried to just wing it on my own with my own money and none of his would that be smart or dumb?