I think I've fallen for my ex all over again

My ex and I, we were each others first everything, but more importantly we were each others first loves. After almost 4 years apart, we've seen each other again recently. It feels like we were never apart. I still got butterflies hugging him. He's so sweet, but we're still so far apart. I live an hour away. I came to visit my parents when I ran into him at the store. It doesn't feel like that long has passed, my feelings still feel the same when I first fell in love with him.