It's amazing how humans change;
Today, the love of their life you are,
"their bae or boo of life" as some will all you.
An irreplaceable piece in their puzzle. Your absence in the picture makes their painting incomplete.
Taking you off their lines makes their sentences meaningless,
So also the absence of your chapter in their stories erodes it's reality, Transcribing it into fiction.

Until Mr "change" comes knocking.
This door swings open as his knuckles kisses its surface, instantaneously for some persons, some others with a little bit of hesitation, but finally, theirs gets shattered by inconsistencies; in communication first of all, then the others follow.
The love, care and attention they once voluntarily showered on you, withdrawn.
The patience they had for you in your time of madness, vanishes.
The good memories you made together, swept under the carpet.

It's gets from bad to worse as each dawn comes.
At some point, you can't help but ask yourself how your relationship got to that extent.
From experience; I've realised such relationships hardly get back on track, no matter how much effort you put in as an individual so you have to learn to flow with the tides.

People change, deal with it
Get use to this fact,
And learn to move on.