<human>: Condense the text into a few key points

My boyfriend and I want to live together this summer after college classes end. We have found a couple of cheap places within biking distance of where I have a summer job and 20 minutes from campus, where I am taking a summer class. The problem is, my parents.

My mom insists that I live at home this summer to save money. However, home is 45 minutes away from work, and I would only work 4 days a week. If I did not live at home, I could work 5 days a week, pull overtime, and actually walk away from this summer with more money than if I lived at home, even with rent and groceries.

If I lived at home, this would also mean that my boyfriend would go home (across the state). Any money I'd save from living at home would immediately go into gas money to go see him.

My mom [46F] is the one mostly against it. I have 3 siblings, but only my sister is still at home, and we can't stand each other, let alone share a room all summer when I am getting up at 5 am everyday (which I wouldn't have to do if I lived closer to work).

I don't know how to convince my parents that I am old enough to make this decision and live away from home. I'm a little concerned that they will no longer let me use their extra car (which I have been using for the last year) if I straight up defy them, and then I wouldn't have a way to get to my class or to church.

So, my question is, how do I make my parents realize that it's ok for me to not live at home this summer without inflicting their wrath? I hope it doesn't have anything to do with my boyfriend (we have been together 7 months). I am the oldest daughter (2 older brothers), if that helps, and I grew up in a very Christian household  (but my brother lives with his girlfriend, so is it because I'm a daughter not a son?).
<bot>: Want to live near work with boyfriend this summer. Parents begin difficult about it despite logic being on my side. I'm afraid they won't let me use their car this summer if I defy them. Help convincing them??