Why is it, that we value people and relationships after they are gone?
When you love someone, you just love them, there are no ifs and buts and why and when related, in short there are no questions synced to it.
Selfless love in life is like a gift, we just don't realize it and are caught up in so many -"oh, I have done this for you", "you don't have time for me", "you don't love me anymore", "why should I say sorry first" type of things, rather than to embrace and keep it safe and have the time of your life.
Life, which is unexpectedly either short or if your lucky, is long enough to grow old with someone you love, with someone for once you actually thought that your life has got a meaning and something to hold on to.
No matter of those hurtful fights and arguments, that could or might have hit your core, the moment your someone steps out of your life, you get a reality check big one. And with the plight of getting into the mess of whose going to talk first, you just lose the one, and with that you lose someone.
Hold on to the person you promised to love and don't let them go at any cost. Because in the end, you are not failing him/her or a relationship, you are failing yourself. You are the one who thought that you are capable of loving someone and be loved back, it was your decision, it was something you fought hard for.
There is no place of the word "excuses" in a real bond. Either you are there or you don't want to be, there is no third door.