It's a fact that in our life we will meet different people whom may help us all throughout the journey and there are some who will just leave us.

Very true. The time spent with other people however does not matter. You may be able to meet someone who will have a huge impact on your life but would only last a week for you to get together. Just like what you said, there will be people who will be there til the end of your journey and there will be those who will leave. For me, it does not matter if they leave or stay, what's most important is the chance for those people to be part of your life even in a small way. Good read, thanks!