I writing a song tell me what you think

Layin here thinkin bout how fast the days have gone by I’m now 16
and it feels weird and I don’t know why
I’ve lost so many friends and gained so many new
but no one can replace you

You taught me things that no one else could
and now I miss you more than I thought that I would
I know that you really care about me,
Even though I'm past 15,
I know that your not by my side,
Every second of the day, and night
cause things, they always change
Nothing stays new
Days, months, and years go by and were just passing through