Not a good one, yet I shall post.
No matter how selfless you might become for somepeople, you will still end up being their least. You aren't the hero here either for you might have done the same. Also, there's nothing wrong being Alone. Here's, a related piece:
He had a thousand words to express his feelings,
Emotions that he didn't want to explain.
She made him word them up, but can never understand.
For now he shall enjoy himself,
selfish and being selfless as someone once said.
Sadness turned into anger, heavy heart got heavier,
Now it's being alone, he shall prefer.
They revolved around themselves,
Negligence to him, but own selves
Setting his heart underneath, for they claimed better.
Understanding their own, considering his later,
For he always put them first, now never.
He shall do the same, unknowingly yet properly.
For he can love himself, he needs none,
Alone is what he preferred, so alone he shall now be on.