I feel so emotionally drained and numb

I've been feeling very distant from my boyfriend for the past few weeks, I went from wanting to have sex every single night to dreading when he makes a move on me. I used to be upset when he ejaculated early, now I'm relieved. I don't feel the need to hug him or be around him. And I feel horrible because he is an amazing human being who has been by my side through hard times.

We had a really big fight that almost broke us up, and that might be one cause. I also have a lot going on, uni, exams, getting my driver's licence, graduation, thinking about plans after graduation, etc.

Has anyone felt the same with their significant other? What does it mean?