You've had a long-term relationship with someone, then suddenly they break off all communication. You send them texts, emails, leave messages on their phone, but you don't get replies. It's as if they're not there. Or perhaps it's you who's not there.
Looking back, I'm not sure what I ever saw in her in the first place. She was just a chance internet hook-up and somehow it developed from there. I helped her out with a couple of things, but then I suppose I stopped being useful.
Better off without her.