Do I love him?

Ok, I've known a guy for almost 2 years, and we've been friends for that long and now I have been dating him for 3 months. And I've had a crush on him ever since I layed eyes on him last year but he never knew that I liked him until he came out with saying that he liked me. Well, right now our relationship is perfect, we're not like those usual teenagers who go out with a guy/girl and makeout with them the first day and then throw them away. We base ours on honesty and all of that good stuff. We have fun together, we never fight, and we see things eye to eye and can pretty much finnish each others sentances. The thing is he feels very strongly about me, and in the past I've said I love you to guys that I never really meant it to. I feel so happy when I'm with him, but I like to keep things slow, not rushed, because I don't want to say I love him until i know for sure. Lately I've been thinking that I've never felt this strongly before, and I want to say it, but I'm not sure. Help?