Loving someone?

loving someone teach me how to miss and to love and feel to be loved...but if someday, the person we love had left us dun blame them
we must look at us 1st..why did i say so because in loving sum1 dun to obsess and the consequences of that we are going to loose half of ourself ,confidence!
this happen to a friend of mine, she gives everything to her boyfren but then the guy only took granted on her..so girl are u aware about this things happen???=)