A life you can't plan for when you know heavens lurking

People make plans and these plans make these people.
through life experiences,
and where they want to be in so many years time.
how can one make plans for a future,
if you are forever living in fear of the grim reaper?
even alive my best laid plans don't thrive but get dismantled,
piece by piece,
till theres nothing left and I'm no more absolute,
just broken.
marriage?
with my ticking timepiece, 
subconsciously i feel i need to find my one true love to have and too hold,
before my time comes,
like when the drs have told.
I've found the one,
i do truly believe,
but how can we plan for a future when already my body feels like an Autumn tree, losing its leaves,
as i slowly feel myself,
slowly decay and deplete,
how can i plan,
when in a year and a half i'll possibly be compost for little worms to eat.
maybe not even that long. Could be now,
today,
tomorrow or even next week!
nobody knows. 
i believe I'll be here 1 way or another,
till im 61 or even one hundred and four.
so please tell me how can i plan, 
when i dont even  know the date the reaper has planned to descend on me and take me out of sight,
to a different land.
drs say they know but I'm a bit of a joker,
so the jokes on them as my lifes plans they have,
I'll try my best to alter.
but with heaven feeling like its hiding and lurking behind each corner,
please tell me how you would plan or would you,
like me take each day as it comes,
planning for nothing,
but just feeling happy and grateful that I'm still alive and having the time of my life,
Still here and off my kids and my girlfriend i thrive.
They make me feel like a summer tree or an evergreen,
sprung into what life there is, that's still left in me ....
so i don't plan and don't  ever think i will.
I'm happy as i am so why change at all? 
i live life on the edge and never look back,
as i'd hate to lose it all all and fall off this now,
well beaten track.
so what!
i don't plan,
i just stumble on and take each and every day as i can.
If i live like each day could be my last,
dont hate me for it as its always helped me to live an amazing life,
everyday in the past!