Is FOREVER really exists?

I never thought that you will be the one to keeps me happy, inspire me for everything I did, and you show me how the world is wonderful, you lighten my day and I know deep inside that I love you, but I am still wondering why I have doubt to lose you, that someday you gonna leave me and never come back, that's the saddest part that hopefully won't happen.

People always say that there is NO FOREVER, and that love is just passing by, yes I believe that, but did this person thinks that FOREVER is really existed?! why I say so, is because GOD is forever, and Love is one of the precious GIFT from GOD that is why Loving you is one of the greatest thing I could imagine, I love you no matter what and I hope that you love me too, thank you for making me complete.