Precious Memories (Malec)

Fifty years after Alec's death, Magnus finds a box stashed in his closet with a note saying it's for him. He opens it up to see what's inside and is brought to tears by what he finds.
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Magnus stared down at the dark box that sat in his lap, almost afraid of what it contained. He had found it buried deep in the back of his closet. On the top read a printed note that said To Magnus.

He cautiously lifted the lid and pulled out one out of many pieces of papers. Unfolding the letter, he pulled his legs up to him and wrapped one arm around them. He immediately recognized the messy, scrawly handwriting of Alec. He blinked back tears.

Magnus,

If you're reading this I'm probably dead, the black ink read. I don't know how old I'll be when I die (though it will most likely be soon) but I'm almost nineteen now.

I'm writing this because, when I do die, I don't want you to forget me. Please don't forget me. I know you'll probably date many more people, and have many more lovers after me, and that's okay- I'm grateful for however long it is we get to spend together now. But please don't forget me.

You might be reading this a day after I die, a year after I die, five years, ten years, twenty years after I die. But I want you to know that whatever happened, I didn't- I don't- want to leave you.

I don't ever want to leave you.