Unexpected you

You come along when I need it  most
Hopelessly and alone as my desperation grew high above
You make haste and in no time
You were cherished in my heart

It may seem selfish and non-nonsensical
Given the duration of our acquaintance
And so I beg of you to fear not
But to trust more and say "I'm sorry" no more

Don't make quick departures
And stay with me
As long as there will be laughters
You'll have a friend in me