I am not sure why you would even consider bothering with any one of these guys that go silent and the suddenly pop up..
Seriously.. It takes literally 60 seconds to send someone a text and say,, Hey I have a lot going on right now... I just can't devote the time and attention you deserve... whether its the truth or not.. It's just common courtesy, and if a man cant even do that.. wasting a nanosecond on him is foolish.
I mean no offense to you... But I think you might want to spend some time on yourself and find out why you would even care about hearing from some guy you chatted with for a day or a week and went silent.
It's simple really.. You deserve better. You just have to realize that and follow through on your standards and acceptable behavior from guys you meet online or in person.