Forgiveness is essential to a great Marriage. The longer you have lived together, the more important it is that you not accumulate resentments that tempt you to call upon them in times of disagreement. Make a vow to keep disagreements limited to the current issue. Avoid sentences that begin, "You always ..." or "You never ..." such as "You never remember my birthday." If something happened long ago, forgive and forget. Even if it happened yesterday, consider granting forgiveness for your own sake as well as your partner's. Forgiveness is especially a blessing upon the person doing the forgiving.
Let today be the day you do an emotional housecleaning of your relationship. Gather up all your old emotional baggage and put it out with the trash.