gemini boy has me wondering

I'm a pisces girl. I work with this gemini. He is VERY attractive but very young. Younger than me. I look his age but i'm not. We've worked with each other for almost a year but never really paid attention to each other.

Recently I had to help him with something work-related and when I had to speak to him on his day off, a mutual work friend gave me his number. We called and spoke often for a few days and he even trusted me with his accounts. I helped him out big time and i joked that he should buy me lunch for it. He did...twice. We turned our half hour lunches to an hour because of our conversations. I still didn't think much of anything but then I slowly found myself having a crush on him.

After the little work dilemma was solved, he'd still come by my desk often, pull up a chair and talk to me at length about it. Then i uncharacteristically started to feel like a shy little school girl when he'd come around and i'd purposely make myself look busy to deter his visits. Later i would drop him a little cartoon note to let him know he could come grab me for lunch if he wanted... and he always does. He's dropped by my desk to ask me if I was going to company bowling night and when i purposely go all day without speaking to him to see if he'll come over to me, he shyly comes up behind me to see if it's ok to come and talk to me.

I get the feeling that he likes me but then i think i'm reading too much into his actions. He has my number but he hasn't asked me out on a date and when we aren't at work, he doesn't call me. I really think he only likes me as a friend because i would think he would've asked me out by now, but i dunno...even my guy friends at work don't act like this.

I'm not sure what to think. Is he just being friendly or does he want more?