Why is he putting his phone on DND? Does he have a girlfriend or is he not interested?

So I just recently gave this guy my number.. he’s been trying to talk to me for awhile now. So the first day we texted for a little while then stopped I texted him the next morning but no reply so I texted him a couple hours later and still no response and the imessage didn’t say that it was delivered then the next day he texted me I asked him what was going on and he told me that he was irritated and usually put his phone on DND when he’s irritated. So I brushed it off and we talked for a little then he said he would text me later after he was done with what he was doing, he didn’t text me so I decided to text him and now my iMessages aren’t going through again still showing up blue but not showing that it was delivered. Could he have a girlfriend or he’s just not that interested in me?

Why is he putting his phone on DND? Does he have a girlfriend or is he not interested?
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