Never expect EVERYTHING from your relationship

Failure to meet your expectations could bring about disappointments. A lot of people usually expect their partner to satisfy all their needs. For instance, your partner cannot give you joy no matter how caring or affectionate they might be. If your joy is not from the inside, no one else can make you joyful. Don't make your expectations "too" high. They are human and cannot meet all. But when you have fairly normal expectations, you won't have much of heartache or emotional trauma.

Remember, moral standard and high expectations are two very different things. You should compromise your moral standards because of a relationship. Tons of people that have done that regretted it on the long run.