Could a very outgoing guy ever like a very shy girl??Help?

There is this guy who I have started working with. He is extremely outgoing (like loves to talk to anyone and everyone 24/7 nonstop). I didn't like him much at first, and actually thought that his non-stop talking was a little annoying. But after a few weeks I've started noticing things that have really been attracting me to him. He always looks me straight in the eyes when he talks to me and always acts really engaged in the conversation with me, but he may act the same way with anyone else he talks to. He smiles a lot (at everyone), but gosh his smile is the biggest sweetest smile I have ever seen. He seems genuinely interested in talking with me, but I can't tell if that's because he likes to talk to everyone. I don't know him that well at all yet, but while talking to him, he happened to mention his ex-girlfriend. Is this a subtle way of telling me he's single? I find myself thinking about him all the time now. When he comes near me, I get butterflies. If he's ever sitting next to me, I want nothing more than to just hold his hand. He has never dropped any hints to me that he may be interested, and I havent either to him. Even though I obviously really like him, I find myself extremely intimidated when I'm near him, because he's so out there and outgoing, and I'm very reserved and shy. I'm afraid that he could never like a girl like me because our personalities are so different. Every day I find myself falling a little more for him, but I'm so scared that he will never feel anything for me. Are there any subtle hints I should look for that may tell me if he could possibly be into me? I would never be bold enough to make the first move, but is there anything I can do to better my chances of getting him to realize that I like him?