I need some words of wisdom!

I dated this one guy for almost a year (eight months of that year being long distance while I went away to college). The relationship was built on a very strong emotional/physical connection and a very strong desire to be with each other forever. :/ Throughout the relationship, I had doubts because our individual dreams, goals, and world views didn't line up (now I can see that that is a pretty big deal). Finally, after coming home from a long and hard sophomore year (hard because of the relationship), I broke up with him... it took me months to do it, so it was a big deal.

On a side note, he was my first boyfriend! I truly thought we were going to be in love forever. (Now, I feel naive.) Anyways, to my surprise, it hasn't taken me long to get over him. I thought it would, but after the first few terrible days of post-breakup, I felt so good about it! I knew I'd done the right thing and that if it hadn't happened right then, it would've happened five years down the road...

So that happened back in June. Some friends from work who with my through the break up started asking me when I'd ever be ready to date again. Then one of the guys that I didn't know very well asked me out maybe three weeks ago. I decided to give it a go.. we've hung out a few times now, casually, doing friend-y things. It's been so refreshing to meet someone new and get to know him slowly without having my emotional energy sucked out of me. Although I'm attracted to this guy and could see myself in a serious relationship with him, I don't know if I want to get into another serious relationship right now, and I don't know when I will be ready.

So here's my dilemma, I really enjoy hanging out with him, but I'm afraid that I will have to shut him down if he makes a move. :( And I don't want to lead him on and keep him on a hook until I'm ready because I don't want to waste his time!

I'll answer any questions if you'll help me out here. I don't know how to date!