The only good I've ever done (marvel)

I'll always be here for You little Brother

So first fic idea popped into my head...
It's Thor and Loki when their both kids I don't actually know their age difference but let's say Thor is ten and Loki is seven to begin with I think I'll have several scenes with them each getting a bit older. Asgardians are weird. Also I'm sorry if this isn't very good I'm still working on my style.
Enjoy! (Or not I don't know how depressing this will be)
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"Be careful Thor! Mother said to say safe!" The young raven-haired boy was stumbling along the earthy path through the, previously peaceful, forested hills of Asgard.
"Oh don't be a bore, little brother!" Thor stood 15 foot up, high in the branches of an old oak. His face was clear and glowed with glee.
"You can be such a wimp sometimes Loki, when I'm in charge no one will ever be as much of a scaredy-cat as you"
Turning to reach up for the next branch, brushing back his blond locks from his eyes, Thor didn't see the dejected look pass over Loki's pale, upturned face, shadowed by the silhouette of Thor as he climbed higher and higher.
"It's getting late, please brother I think we should return home!" Pleaded Loki.
"Stop being a baby, it's not even dark yet!"
"I'm not even scared of the dark though!"
"Yes you are, little ickle Loki, scared of a few shadows!" Thor mocked, dancing along his branch, "what would Father say knowing his son was scared of the WHAA—"
But Thor never finished his sentence. He had been so wrapped up in his words that instead of watching his footing, he had slipped and started to plummet the 20 foot to the ground.
THUNK.
"Thor..." Loki whispered, half terrified for the answer. Thor groaned and rolled over.
"h-Hah! It'll take a lot more than a measly fall to defeat the mighty Thor," the storm eyed youth laughed, rolling over and gingerly getting to his feet. But then he paused. Looking over to Loki his stance changed.
"Hey, you weren't worried about me were you?" He asked, his tone more gentle than it had been all day."
"N-no!" Loki muttered, rubbing his damp eyes.
Thor looked at him softly.
"Hey, you know I'll always be here for you..." Thor smiled awkwardly. It wasn't really his thing to be sensitive,
"Al-always?"
"Always, little Brother,"
And with that he beckoned Loki over and swing his arm around the slim boys shoulders.
"Now, I think I may have sprained my ankle so I need to to help me get back to the castle....
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More years later than anyone could ever know (this sounds depressing I more meant that I don't know, Asgard has weird time)
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"You said you would always be here for me brother,"
Loki stood alone, lost somewhere is the vast plains of space.
"You said you would always love me..."
His back was to the glow of the suns behind him, casting his face into shadow.
"I guess you were lying."
And ignoring the pressure behind his eyes and the heat creeping up his throat, he backed into the shadows.
"Goodbye Thor."

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Ok I'm sorry that was sad.
Please please please comment with your fic ideas for me to do.
Also tell me what you think of the fic please please please.