Welcome to Steemit @tinti! :c)

I think that one mistake that many people make in life is to not only enjoy the company of others but to allow themselves to grow dependent upon such.

This is more commonly the case in the event of 'love' but even friends can get too dependent - and then when somebody says goodbye, they feel it deep inside.

Take heart. They are not gone but are chasing their hopes and dreams - and today people can still keep in touch and visit each other - easier than ever before. :c)

By the way, since you're new here a quick read through this post may prove helpful.