This is good but I think you could put a bit more verbs rather than adjectives... dunno, personal thought.
Narq.

I like how the poem started... happy, joy then at the second verse, the opposition... bang!

Slowly you feel that pang of regret,
Except, deep down you know its been there
And you can't do anything about it -
You are helpless

It comes too you - your regret in form of worry (This is very true... well that is what happened to me when I thought I messed up my exams... I am going to have a heart attack young man.)

Nice touching poem. It is beautifully written. As expected from you Kai! Go for it!

it's pretty good :)