Now that you’ve considered your initial reasons for getting together, think about that all that time between the beginning and what appears to be the end: now. What happened to get you and your partner to this point? If there were previous times where you also seemed to reach a breaking point, what kept you together?
Bottom line: is it worth it to stay together, or is it better to leave? Think about yourself as an individual, your partner as an individual, and finally, as two individuals in a relationship.