<human>: Give me the gist of the text in a nutshell

I'm [F 18] planning on staying at my university this summer to take a class and do an internship on Capitol Hill. This will be quite an expensive endeavor, but because my mother [F 48]wants me to graduate in three years, I have to take a couple summer classes. My two options are to either stay with my boyfriend for $800 or use campus housing for $1550. Given transportation and course costs, it would be $700 cheaper to stay with my boyfriend than on campus. My usual frugal mother has now decided that it isn't all about cost, and it may be better to live on campus. But our conversation never gets past this because she doesn't even think I'm capable of getting an internship (what a slap in the face that one was). Because I've agreed to pay for half, I can only afford the cheapest option. By choosing to spend more money overall, I will have to all the money I've ever made or saved. So, my question is should I just go ahead with her more expensive plan or attempt to put my foot down and stay with my boyfriend? Thank you for all the help!
<bot>: My mom [F48] and I [F18] are fighting because she wants to spend $700 more than necessary for my summer plans and I can't afford it. What should I do?