What do I do?

SO and I have been dating for over two years and I started long distance about a year ago because of different school. We've been having problems on and off for about 6 months but always continued fighting. The fighting is getting exhausting and I feel like all of my energy is going towards this person. I know if I work hard enough we might have a chance at making things work but right now school is more important. I'm just not sure what to do because this is someone I love and care about deeply.