Why did my boyfriend do this?

You need to calm down and act like a confident adult. Be secure in your relationship. You seem to be acting needy and little girly. Would you like that if someone was like that to you? It's like someone in the car asking every 3 seconds "Are you we there yet"? Get his tone.....you said you missed him and you saw him the other day..you are making yourself look like a needy little girl. When you go over there, be strong, stop being needy and enjoy yourself!