Do something nice for your partner during a rough patch
Cold shouldering or constant arguing about a contentious issue will likely just drive you apart. A thoughtful gesture can go a long way in helping you feel closer to each other, making it that much more likely that you will work through your problems. This works especially well if you feel like your partner does not compliment or do nice things for you often any more. Start complimenting them and make it a point to be nice they'll WANT to do something nice for you!