There are different types of people that come in and out of our lives. There are those that leave because you outgrow each other and those that stay usually do so because you choose each other.
And then there are those that walk in and stay by accident. Karolien is that friend. We played in bands together at university. We never really moved in the same circles, but we always got along relatively well. When university days came to an end, she was the last person I expected to still have in my life 5 years later. It started with daily google chat conversations when we both hated our jobs and lived for our google translate conversations that varied from French to German! In retrospect she really got me through those 15 months. We had an opportunity to catch up today; see each other again for the first time in years.
I walk away now so grateful to have her as a friend and grateful for such flukes in life. We don't always know who is best to have in our lives. It's nice to have certain people that we have no choice in having.