Re: boy probs....
Well first off, it generally isn't too difficult to determine whether or not a guy is interested in you. Most of us are pretty predictable and obvious about it.
Secondly, I hate it when girls ask their friends to come talk to me. It's like they don't have the balls to do it themselves. If you're not sure if he's interested, then ask him to do do something. If he expressed an interest in the idea, then go for him. If not, either keep trying or start going for other guys.