Neither is worse. What's sad is when you realize (you) were the only one keeping the "friendship" alive.
With all the social media, email, SKYPE, smart phones with face time and various modes of transportation there is no reason for anyone to (lose touch) with a "good friend" unless it's intentional.
Essentially this would mean (one of you) has made it less of priority to stay in touch. At some point the other person might realize they're always "the one" initiating contact.
"What would happen if (I) didn't call, email, or message them?"
One week goes by, then two weeks, a month, and their "friend" never contacts them! If someone doesn't call you it's because they don't want to talk to you. (And vice versa).
Naturally this would make one wonder were they ever really "good friends" or was it in his/her mind.