Make sure you are in a healthy relationship
The first step to being optimistic in a relationship is making sure you're in a healthy relationship. If you constantly feel unimportant and unfulfilled in a relationship, you may need to consider re-evaluating your relationship. Try to communicate with your partner and try to improve the situation.

Believe that everything will change for the better
When you face disappointments in a relationship, it may seem like things will never change. However, it is important to remember that everything in life is constantly changing. Do not dwell on negative events, but concentrate on the fact that in the future everything will change for the better.

Focus on the positive
When you are faced with negative events, it is very important to focus on the positive. For example, you might remember how you met your partner, what were the highlights of your relationship, and how you overcame challenges together. Also try to pay attention to the positive qualities of your partner and what he does for you.

Look for solutions, not problems
When you face disappointment in a relationship, it may seem like the problems are impossible to solve. However, instead of focusing on problems, try looking for solutions. Think about what you can do to improve the situation and discuss it with your partner.