Girls, I'm 24 and inexperienced with men. There's this guy at work who we liked each other and we're dating now? What do you think about this?

I didn't have a boyfriend until now, because I was busy qualifying myself, I'm finishing up my masters. He's 29, tall, strong, good looking, and has dated a few women. We were talking for two months before we started dating officially, and we've been on 10 official dates. The last time we met, we were watching a movie, and we were making out, and then he lifted my shirt and started kissing my belly and it surprised me, I made an excuse to go to the bathroom. I'm afraid of being used for sex, how do I talk about this to him?
Girls, I'm 24 and inexperienced with men. There's this guy at work who we liked each other and we're dating now? What do you think about this?
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