Find a way to make it work. That’s what makes a great relation; two people caring about each other enough to figure out a way to make it work.
Talk it out. Communicate and communicate to make it work, listen to the other person and listen to understand. Don’t listen to reply. Without communication the relationship fails.
Trust each other and trust that whatever the issue is that it will eventually work out because without trust between you there is simply no reason to continue.
Understand that people are often unreasonable and self centered. They will occasionally forget or overlook all of the good and kind things you’ve done. That’s human nature. Forgive them. That’s how it works in the long run, forgive them. Forgiveness doesn’t excuse poor behavior, the behavior we all exhibit from time to time, but forgiveness does prevent that behavior from destroying everything there is between you.
The bottom line is this, relationships are hard work, they are easy to start and hard to keep alive. You both have to work at it everyday.