My friend still seems to be ignoring me

Unfortunately the phone is really the only way I have of contacting him, so I have no way of knowing if he really IS ignoring me or there's just something wrong with his phone. Either way it's really upsetting me, probably more than it should. I want to text him again today but I feel like I've already texted more him more than enough at this point and I don't want to seem desperate. Ugh.
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"The rain keeps crawling down the glass. The good times never seem to last. Close your eyes and let the thought pass."
'Prodigal' by Porcupine Tree