What should I do? I need a males opinion

I have been talking to this guys for almost a year on and off. We just started to get serious and we have been talking about him meeting my parents. I was totally freaked about the whole idea but he insisted that this is a great idea. He texted me the day of and asked if the plan was still on and I said yes... Everything was going great. We even talked about going away together for his birthday and him going on a couple's trip. Also i told him to meet me at my house in the evening around 6:00- 7:00 PM and he said okay. It's 6:00 and i have not heard from him since 3:30 PM and the time keeps going by. I call him and he does not pick up and i text him again to see where he is at and he does not reply. He doesn't even check his phone. The next day goes by and i call him and text him around 9:00 PM. Still no reply! I at first was worried but then i noticed he was liking a few pics on Instagram (yes, i was stalking him). Anyway, I text him saying something i shouldn't have... Now I'm realizing that maybe something happened to him and he's shunning me out or maybe he's with someone else. I have no idea what t