If it's not worth breaking up over, then it's not worth arguing over. If you’re arguing every other day, you’re not in a relationship, you’re on a debate team. Not every concern needs to be an issue. Let the insignificant things stay that way.
Don't be afraid of conflict. Conflict, managed well, is a part of any healthy relationship. It's not about striving to suppress the differences, but communicating in such a way that the differences can be accepted, and maybe even embraced.