Yes, ghosters do come back.
Unfortunately, when they do, it is often because other dating opportunities for them have dried up. You simply become their last option for the meantime until something better comes along.
Once someone has ghosted you in the fashion that this guy did, it is best not to go out with them again, even if they come back. You don’t want to be someone’s last option.
Try not to get so caught up in how much interest this guy showed you at first. A guy with genuine interest in you would keep up that energy. He wouldn’t just suddenly stop texting and avoiding dates.
If anything, a guy who is genuinely interested in you would become even more energized as time goes on because he is getting to know you better as a person and is finding more aspects to your life and personality that he is connecting to.