<human>: Can you provide a brief overview of the text?

This fall i'll be a freshman in college. I've been friends with this girl since my freshmen year of HS, and we've been through a lot.  We dated last summer after i helped her through a bad break up, but things never got very serious.  I ended up being given a seat on the friend bench when she got a new BF, which killed me at first but i've recently become used to it and i thought i found a good peace in our relationship, as we are still a bit flirty with one another but its understood that actions don't follow the words.  However, as she has labeled me her "best friend" we talk on the phone for hours at a time, and hang out during almost any freetime. this is where my problem occurs- she expects me to make her essentially my priority, and she gets quite butthurt when i decline her invitations in order to hang out with other friends.  How do i nicely tell her that i can't hang out with only her all the time, that i have other people i enjoy life with? Essentially how do i nicely say that its her BF's job to make her a priority and unless thats me, its not my problem, or is it even worth the trouble since we are going to different colleges?
<bot>: how do i tell a female friend that if she wants to be a priority, its her BF's job to do so?