They dont drag me. They add positive stuff to my life, once in a while, and that is super cool. And they dont ask much in exchange, just for me to not be a jerk in that situation.

And all of them are relationships with someone I already know, can ve safer around then random and some of them grow again into more active friendships in right situation.

And yes, that friendship happens again thing is real.

"Drag on for too long" Who are you to dictate how other people connect. The word friend is not well defined, but a person I know from my past that I'm able to keep in contact with, thanks to the magic of technology, that I want to have some communication with, is a something.