How should we figure out our budget?

My boyfriend and I are trying to change how much they contribute to the monthly bills . Less than what we do , about 9.25/hr 14.50/hr and I took over , we both get overtime if we're lucky . So, obviously , has less than me. Right now I have waybills more than him, I have : MedlinePlus MedlinePlus Mortgage - $ 450/mo MedlinePlus Car- $ 290/mo MedlinePlus Car Insurance- $ 180/mo MedlinePlus Cell phone - $ 150/mo (2 lines / me and mother who pays for ) MedlinePlus Electric - $ 190/mo ( be reduced ) MedlinePlus Credit Cards - $ 50/month MedlinePlus Groceries- $ 90/every two weeks - you pay the other half MedlinePlus MedlinePlus These are just my bills , pay our bills SHARED MedlinePlus Condo fees : $ 160/mo
he pays half of the USDA Agricultural Research edible - around $ 90/2weeks Cable : $ 170/mo ( we are lowering the bill for almost $ 100 as of August) MedlinePlus MedlinePlus He also has a cell phone bill was reduced to only about $ MedlinePlus 75-85/month self - insurance $ 62/month MedlinePlus student loans - $ 55/month MedlinePlus MedlinePlus I do not want to take all your money and leave w / anything, but out of my control usually only have about $ 200 left , then I get the shopping and I am left with about $ 100 for 2 weeks when has more than that. I want it to be right , but I'm having difficulty understanding a budget system that works for the two w ​​/ o him feel like he was giving me EVERYTHING, b / c I have much less than me, but I 'm paying a lot things .. I did not expect to pay my bills , but for all that atleast 40% share ? ? MedlinePlus MedlinePlus %