When guy doesn't talk to you often, it doesn't necessarily means that he doesn't like you or you're not attractive to him. There are many types of guys, but for now let's say there are two. The nervous one, and the confident, outgoing one. In the case of the first type, the most probable cause that he doesn't talk you often are the following.
- You might be too attractive, too beautiful or too popular that he doesn't have the nerve to talk to you.
- He DID trying to talk to you indirectly when in a group. He doesn't talk directly to you, but he wants you to hear what he said.
- He's a type of those shy guy who doesn't know how to talk to a girl.
If that's the situation, then it must be you who starts the talking. Start by smiling at him when you make eye contact as you pass him. If he smiles back, then it's all good.
Whenever you have the opportunity to start a conversation, use it. Talk about common interest, so the conversation goes lightly. When it goes well, ask him about his interests. Spark the conversation by showing that you're interested in his interest and wants to know more about it.
If he's the type of nervous guy, then chance that he doesn't have many girl friends and you'll be the one he will ever talk to.
Remember, even the most cool, confident looking guy feels nervous when they meet certain girl. The girl might be you.