I frequent a student building on campus and I've seen this one guy who I find attractive. We've never formally introduced ourselves to each other, but I've seen him at a meeting and I often see him eating lunch in one of the student buildings. I'm single and ready to mingle, though I don't know what to say to a complete stranger...without sounding like a creepy stalker...how can I start up a conversation with this guy, who always seems to be with one of his guy friends at lunch...?