Even the best relationship will go through some ups and downs. If you're having difficulty with your own, it may be a good idea to get relationship counseling. A licensed professional will be able to help both involved parties better understand each other.
If you have already married your significant other, the therapist may also be able to provide marriage counseling. This has many of the same aims as normal relationship counseling, though it also acknowledges the issues that are unique to married couples.