What was he trying to say?

I’ve been texting this guy that I’ve known since seventh grade (we’re seniors now). He liked me then but I didn’t like him, then I moved away and never really thought about him. I saw him this summer and we started texting and even hanging out. We seemed like we were getting close to an actual relationship, but then he thought I lied to him about something really stupid (which I didn’t lie, by the way). Then a couple nights later I texted him and he seemed bummed. I asked him what was wrong and he said that his ex girlfriend lied to him and led him on. I’m not sure what that meant, and he won’t even text me now so I don’t know how to make everything better. Does it sound like he wants his ex back or is he just afraid I’m going to do the same? I would ask him myself, but he’s ignoring me, and it’s not just a normal boyfriend/girlfriend issue. I don’t want to lose one of my best friends.