what life is this?

Love? I still remember my middle-aged English tutor said that he already married twice and still don't know exactly what is Love.

Neither do i understand 'in a relationship' ...for me its like 'ok...sweet...'
Everyday there is heart-broken...I often wonder why some people in a relationship still wanna woo someone else. Its so outrageous...i always avoid such people in my life. But sometimes they happened to be my good friends...Why can't they be more loyal their gf/bf...so sick...