I'm so stressed with school... I can't get turned on!

This is my last year of Jr. College and I'm about to start applying to Universities next week. I'm taking more classes at once than what I am used to and I'm incredibly stressed. I've been reading all the posts about what your vaginal system does when you don't use it sexually for example you muscles get weaker, and your ability to feel the sensation of sex lowers. Those two freaked me out. My boyfriend and I haven't had sex since February, so it's been a while. Though I can't get turned on. He has tried so hard to turn me on with things that had worked for me in the past but now it's almost impossible (and it's not him). I can't even turn myself on. I had even tried porn but nothing. Any advice? I still want to be active but just school is taking up 90% of my life. How do you girls do it?!

I know relaxation is big part buy my next vacation isn't till Thanksgiving... I've been like this since April, it's bugging me.