Money issues- is this fair?

At my job in the summer I only get to work usually 3 days a week (other seasons I work full time). 
My boyfriend expects me to pay $250 in rent, $70 in bills, buy most of the groceries (usually all), and other house essentials. Along with my phone bill and car insurance obviously. 
He works over 70 hrs a week and makes way more money than me.  
He pays the rest of the rent and helps with buying house essentials from the dollar store. But he pays for most dates, I do occasionally. His phone bill and car insurance is way less than mine.  
I'm wondering if it's fair for him to expect me to pay so much?