Who Am I To Stand In Your Way?

Who Am I To Stand In Your Way.

If there is somebody that makes you feel happy, tends to your heart in the ways I am lacking, then who am I to stand in your way"

The lyrics really tears me up because thats exactly how I feel when I finally go from your life.
It doesnt tear me up because you choose to be with someone else. It is because I could not be the one that makes you truly happy even if I love you so much to the point I give you all the love I have.
And it keeps raising questions in my head like,

"what did I not do to make you happy?"
"is there something wrong or missing within me?"
"why cant I be the one who makes you truly happy?"
"i thought loving someone was a happy thing? Why does it bring me to tears whenever I think of you?
What am i to you?"

But then I realize. Who am I to stand in your way for you to be happy and successful in your life?

That is why I gotta stick to my place and let she tends to your heart which I have been lacking.

And I hope she loves you more than me.