Well, ... I feel like crap. I think I may have put someone through something akin to that, albeit in entirely different circumstances. >.< Anywho, a month is quite some time, ... definitely not worth doing anything crazy, over this. It sounds like he is ignoring you, but there is probably a reason for it, ... the way I see it, it could be:

1. Is a giant "douche" and love to string people along then ignore them for a month.

2. Is involved with someone else and doesn't quite know how to handle things with you, or is involved with someone else and knows he needs to take a step back from you.

3. Doesn't understand his feelings, if existent, for you, and has taken a breather. (not like he can just say "Hey, I'm falling for you again, ... so to deal with that, I'm gonna go have a manly cool-off period to get my crap together")

4. He's genuinely really busy, ... I kinda don't buy this one, mostly due to the FB bit, ... and it being an entire month.

It could just be that you wanted it all to work so badly, that you read too much into things, ... got a little bit too textytextymessagymessagy and kinda scared him off a bit, ... if that's the case, take a step back and give him that space. Problem is, without knowing, ... it's hard to know how to react. >.<

Tricky sitch. If it were me, I'd just leave him to it, ... I'd just assume he obviously doesn't want to know. His loss! Maybe you'll get an answer or a reason, eventually.

I can honestly say, ... if I got in touch with one of my exes and started talking every day, like that, for ages, ... there's no way I'd just stop for an entire month, without saying anything, unless I had a pretty good reason.

Good luck. Let us know how it goes.

PS
What happened last, between you two? Like, the day you last hung out or something. Might be a clue in there as to why you've not heard from him.