Like it! But you should place a comma in a few places so we know when to pause. Then to continue reading again.

For example,

"Gone for days, months, years,(you got those commas right)

Hearts stung, with worries and tears.

Missing birthdays and graduations,

Weddings and Funerals.

So you get what I'm saying? No harsh words meant. This is really great! ;)

Great anti-war poem. You clearly carried out the message.