We've been dating for almost two years. And we talked about "love" and everything and we just don't know. We've never told each other we love each because we want to be certain about it. We're 18 but still so young and this is both of our first serious relationship. When I think of the qualities of being in love I feel it all for him but I don't know if I love him. And he feels the same way. We mean the world to each other and he makes me so happy. We talked and we said when we envisioned the perfect partner, we're it. I'm what he's been looking for and he's what I've been looking for. Is there a possibility we are both in love and we just don't know it? How do you know it's love? Help