Given that you have posted this in the birth control forum, I will add, the nice thing about love at 13 is that it is almost an innocent love, whether you guys are physically excited about each other or not. I would not let "real love" be a justification for having sex this young. You can get a lot of thrills with what one of the other posters on this site calls "hands on sensitive places" and don't have to face the rush to grow up and other complicated features that come with early sexual experience. Please don't rush physical intimacy. It's too big and changes things too much, and isn't something to deal with at 13 if you can help it.
I agree with Christine. At 13, it's very close to pure love and is rare and wonderful. But leave the future to itself. You will change a lot in the next decade, and so will he. Maybe your paths will stay entwined, and maybe they will diverge. Maybe you'll grow apart and later find each other again. But trying at this point to build a lifetime plan on the love you feel now, well, that is not for real. You're not as tall as you are going to be, you are not as adult in your features as you're going to be, your body doesn't look like it will look when you are older, so take these obvious upcoming physical changes as external signs that other changes are going to come too. Emotionally some change is still going to come. You will definitely see the world differently and respond to it differently when you are 23, than you do when you are 13. Be ready, it's all fun and you can love it all. Just be open to what comes. :)
I believe it is love. The thing is, you will both grow and mature and your interests will change. Chances are you will grow apart. It doesn't mean you weren't in love...just that things changed.