[Miranda_]

That's not love. That's a crush. Real love takes time to develop, between two people who care for each other very much. You said yourself; you don't talk much and you're not friends; that is not a basis for love, or even for a relationship. If he doesn't like you, but likes one of your friends then sorry, but there isn't really anything you can do. Just explain to his sister that you'd rather she came over to your house for the moment, so you don't have to see her brother. If she asks, just say you'd prefer it this way. Give yourself time to get over your crush, and eventually you'll wonder what you ever saw in this guy.