I think I love someone?

Okay, so I think I love him but I feel like I'm way to young to love someone. I just can never stop thinking about him. Like he's on my mind 24/7... literally. It's 3:12 in the morning and all I can do is just think of things that make him so adorable perfect cute amazing sweet lovable... sorry, I got carried away. Anyways, why do I love him? I'm only 14! How do you love someone when you're that young? He says he likes some other girl but I still act happy for him because I like seeing him smile. Whenever we text each other we have this thing where you have to put a smiley face or the other person thinks you're upset. And everytime we talk about the girl he likes I feel like putting no smiley face but it's like the smiley face just magically puts itself there so I can see a smiley face at the end of his text. Whenever I hear a love song on the radio, I swear all I think about is him. I don't know if I love him but I think I do. I honestly feel like I can't live without him. It's like I just need him to say hi to me and I can be smiling for the rest of the day. I get extremely happy talking to him and even my sister noticed that whenever I'm texting him the smile on my face never goes away. She teases me about it but omg..what am I doing? How do you love someone at 14? Is this right? Do I love him? Please answer! Thank you!(: