well maybe he is busy or maybe he does not have txt or maybeit is time to call him and if he does not answer you well it shows ya that time to find a new b/f
I wouldnt but my guy friend texts me all the time and I don't answer and so finally he calls me several hundred times and leaves me eighty voice messages
If you want to call him then call him, but if he's reluctant to communicate with you, then try to keep your expectations pretty low.
If its just once, I wouldn't think much of it but if it's repeated every day he doesn't respond, he isn't worth it.
Depends on the scenario. If he does not own a cellphone and works out of town on rigs and such
It means he isn't worth your time. I always respond to texts, anything less is rude and inconsiderate.
Definately, don't call.