That he/she can't accept you for who you are.
That he/she can't stand you after some time.
That he/she won't be there for you.
That he/she will take you for granted.
That he/she thinks you are lame.
That he/she can't guide you to be better.
That he/she cheats on you.
That you can't be faithful to him/her.
That you are not good enough for him/her.
That you will get bored.
That you both can't share anything anymore.
That you will get angry to him/her.
That you can't give away yourself to him/her.
That you don't know how to express.
That you are afraid to be touched.
That you are not domesticated to take care of him.
That you don't have enough to take care of her.
That you can't commit.
That you are always fighting. And cannot stand the fights any longer.
That you cannot handle stress, til it affects him/her.
That you don't know what is love.
That you don't know how to love.
That you hang on for too long for a person who doesn't feel the same about you.
That you care for him/her til it hurts.
That you are too afraid to confess.
That you are too afraid to love.
That you are too afraid that he/she will run away from you.
That you don't want to ruin the friendship.
That you will cross the line.
That it won't be the same anymore.
That things won't turn out to be like how you wanted to be.
That he/she dies.
That he/she will forget you.
That you are a hopeless romantic.
That you are too ego to show your true feelings
That you don't know how to show your feelings at all.
That you can't move on.
That you think you are so messed up you can't let someone be dragged down with you.
That you think you don't have the time.
That you are not ready.
That you don't believe in companionship.
That you needed more than one.
That you are clingy.
That you are afraid that he/she is too clingy till it annoys you.
That you find clingy is annoying.
That you both want different things in life.
That you don't feel its right.
That you lost hope.
That you may lose hope.
That you don't believe in love at all.
That you know you will end up alone.
That you couldn't find him/her.
That you just want to be alone.
That you just need someone to be with you all the time.
That you can't be alone.
That you are too choosy.
That you think no one is good enough for you.
That you want everyone's approval.
That you are too ashamed to be with him/her.
That you are too proud.
That he/she has too many bad habits, you can't stand them.
That he/she is ashamed of you.
That he/she is the right person but came at the wrong time.
That he/she came at the right time, but not the right person.
That both of your families can't get along.
That your parents disapprove him/her. Or the other way round.
That he/she wants you just for money.
That he/she uses you for power.
That you are too broken.
So, what are you afraid of?
