Feeling hurt "because of you" part 1

There has a quotes that states:"I can't make you love me if you don't. I can't make your heart feel something it won't." by Bonnie Raitt that adapted from "I can't make you love me,".I felt touched by this words. Being in a relationship with someone give one to think a lots of things, What I should do and don't, and it sometimes make someone learn something that she/he never realized of.

Feeling hurt is must and sometimes is confusing 'why should we hurt each other if we can do our best to take care each other feeling from feeling hurt.

why should in relationship have to feel betrayed even it is not seem like to be, to feel lonely even it should not and feel abandon even it seem not real.

Are someone who asks for love and attention is someone who is demanded and selfish??

why should feeling hurt lingering in someone that should not feel that feeling?

why dating for so long is not the key to show he/she is not the "mr/mrs right"?

why should "parting is all we know of heaven and all we need of hell?"

Are been in relationship, feel the love that one should feel hurt as the expense of the emotions?

If someone who isn't dare to feel the hurt, then he/she have to be aware that love is the thing to avoid. Could love is the a thing that have to be pay with getting hurt then will the happiness is guarantee to the one who really hope that it will be??