Help me please.

I want to apologise to someone who's existence keeps me alive. To someone who understands me. To someone who stayed with me, no matter what. I want to apologise to the one who I will always love. To the one who stood by me. To the one who was my best friend. I want to apologise for making all my stupid mistakes - really stupid mistakes. For running away. For everything. Ethan, I'm sorry.

How can I prove this to him?