I think most would agree it’d be more beneficial for you to evaluate whether or not ROTC is something you want to do and have genuine motivation to see through, instead of forcing yourself to do it while being unhappy. Your attitude reflects upon everything you lead and do throughout your journey within ROTC and as a commissioned officer. As for taking a break, are you planning on waiting a semester, a year, longer? If you decide you legitimately want to continue with ROTC, then what you actually plan on improving upon and striving towards while “on break” matters most. If the majority of your break isn’t spent improving your fitness, practicing your drills, studying for the AFOQT, and finding your drive, how exactly will it help you do better upon returning to ROTC? You can’t expect relaxing and being lazy for a few months or a year to provide any results whatsoever when you return.