Hola!
I agree with everyone...but.
Maybe your friend did decide to move a long and it happens.
Sometimes weird, bad, sad, soul-sucking stuff happens and one can get overwhelmed. Depressed. Stuff can wear you down and leave you in the dust just trying to catch your breath never mind getting up and continuing. Returning a phone call, a message a text is simply too much to do.
I was friends with a most wonderful woman for over two decades. We had been there for each other for so much stuff it would have been unbelievable that we would ever NOT be there for each other but it did. Phone calls, messages on her landline, cell, work, all unanswered. For weeks. Then a month. I was so worried I went to her apartment and no Cynthia Ann, no Junior, no daughter. Gone. What?! Work? No longer there. Scared the crap out of me. almost 5 years later she called and asked to come over. She was literally in tears explaining to me what happened (tons of crap) and how awful it was and how she was upset that she hadn't returned my calls or kept in touch. We worked it out and resumed our friendship for 10-12 years more. Then it happened again and to this day I haven't heard from her...(Her number is no longer in service and all contacts I had with her are gone. ) So, we go on.
Peace.
Hard for me to "like" that, Sigs, but I'm so sorry.
It's my observation that a given human is capable of just about any given thing in a given situation. This includes acts of incredible bravery, or love, or malice, or brutality. I have tried to condition myself to not be surprised, but of courses, surprises are still in store.
As you say: We go on.