College Guy...

I'm a senior in high school and I met a college guy on Meet Me on the 28th. Then we hung out for the first time on the 29th of August. We had sex... then the following Thursday we didn't have sex but we fooled around... now I can't seem to get him to answer my texts or calls... I developed some feelings for him, he told me before we had sex he wasn't looking for a relationship. I said okay. But I still wanna keep him around in some way... the worst part is... he didn't wear a condom. The last time we talked was Thursday the 10th... how do I keep him around?