I think this is somehow related to suicide because it says:

Hold on tight, this ride is a wild one -- (Life is a rocky/chaotic road)

Don't lose your fight, kid -- (Don't lose to your depression/ suicide)

It only takes a little push to pull on through -- (You need some hype/ encouragement to get going)

With so much left to do -- (There are a lot of things to look forward to in life)

You'll be missing out and we'll be missing you -- (If you die, you'll miss out all the awesome things and we'll miss you)