when you love someone, you sacrifice a piece of yourself to that person.  You may not want to do this, but giving your heart, fearlessly and truthfully, you lose a little bit of yourself to that person.  That person also loses them self to you.  

There comes a time when the sacrifice is too great and turns into a game or becomes unbalanced.  It is then that you have to make a decision.  How much is my happiness and self-worth or desire for self-peace worth it to having this beautiful person in my life?  What do you keep and what do you reject?  You cannot keep half a person, so make your decision.  Soon.

The heart does not give up so easily as the mind does.  You may think this is wrong, but your heart continues to shout this is real, this is true, this is right!  Which one do you listen to?  When is common sense better than passion and emotional vitality? There has to be a middle ground.