Hello, I understand the fears you are describing and you should acknowledge & face the fears.  If you are feeling bad more often than good, then it's probably time to end the relationship and move on with life.  The way to understand relationships, is to realize that some are meant to be for a long time and others for a shorter time.  When you find your true soul-mate, those fears will be diminished.  I like to think of it like this...if you are a glass of water and you are happy in life, the glass is 3/4 full (you are missing a mate).  If your partner is not happy in life and their glass is 1/4 full, your partner is not at the same point in time as you and is not ready for a permanent relationship.  It is important to understand where each individual was at the moment that the relationship began.  If you never started at the same place in time, you will never finish at the same place or at the same time.  I hope you understand what I am saying.  May you find love and be happy when the right person comes along!  I will pray for your happiness and that you have a safe journey as you travel through life!!!