Breakup?

I'm not sure what to do. Throughout the past couple months I've been teetering on what to do about the problems in my relationship and the problems in me. My SO and I have been fighting about everything lately, it's been passive aggressive and tense for both sides. My personal problems are that I've been interested in one of our mutual friends for a while and it's getting to be more. We are going to be moving in together in the fall for school and I'm unsure about it now because of the issues. Lately I find myself hoping he'll cheat on me or something so I have a good reason. I absolutely love him but I feel like I need something different?