What happened?

So this guy from school asked me out in July and we were pretty good friends before all of this happened. I liked him too so I obviously said yes, and we flirted for a while then one day we just kinda stopped talking. I tried to start conversations with him, and he’d answer and be nice, but he no longer talked like he used to with me.

And we we hadn’t talked in like 2-3 weeks, so I wasn’t going to say anything because I wanted him to talk to me about something because I had started all of our previous conversations. Then one day he texted me and said the he couldn’t date me (even though we had never gone out, couldn’t find the right thing to do with the right people. My parents have rules). He said that he wanted to, and that it wasn’t me, but I don’t know what do believe. I read it and didn’t respond for a day because I couldn’t find the right thing to say, so I slept on it. The next day I asked him why, he hasn’t responded and it’s been a month.

Any advice?