My name is BLUE

When love betrays you and eats you alive, when do you decide enough is enough? What happens if you by chance stumble upon a situation when your legs turn jelly and you feel like somebody just sucked the life out of you? Imagine hearing promises of a better tomorrow and then witnessing that one person whom you hoped to be your saviour killing you softly right in front of your eyes? Do you run and cry for help? Or do you just leave that relationship even when he begs you not to?
Sometimes you wonder what it means when someone says they truly love you and would always be there for you in times of need. Why is someone's love always taken for granted even up till the point when the person who's been hurt and smashed has to go through therapy to pick herself up? How do you know if someone loves you truthfully? When should you start trusting again?
When you re-question your position in the relationship and you feel like there's nothing to hang on for and that you truly have nothing to offer to the person you loved sincerely and without a doubt, is that an indication to just pack up your bags and leave?
Apologies in this situation are underrated because the damage is really severe. Unless the person who's guilty as charged is willing to work really really hard to establish the trust and the love without even letting the ego intrude. Unless that person understands what the hurt has done to the relationship and how low he has stooped as a human being. I personally believe things might just work if the above mentioned things were shown with so much sincerity and honesty.