Most Helpful Girl
Hmm, it's hard to tell based on that alone, but he might be interested in you! Next time you see him, try starting a conversation and see how he responds. :)
If you want to focus on his body language: studies have suggested that guys tend to subconsciously position their feet/torsos towards the girls that they're interested in, even if they happen to be talking to someone else. Of course, this isn't an exact science, but it can be a good way of getting a general idea if you don't know him well enough to start looking for other clues.
Other than that, do you know anything about his personality? If he's more of the outgoing type, chances are that he'd spend a lot of time talking to a girl he likes, but if he's on the shy side he might be more reluctant to, so him not talking to you wouldn't automatically be a bad sign. Still, if you're comfortable talking to him, that would be the easiest way to gauge his interest. :)
Best of luck, and I hope this helps!