The age old question, in short, YOU CAN’T. How you can better your odds is to learn as much about him as you can without appearing as a stalker. Find out where he likes to go, talk about, do in his down time and develop interest in such. If he likes RC planes, learn about that. When you start talking his interest especially if he never thought you would be interested he will be intrigued. DO NOT try to start off hitting him with the b/f thing or expecting him to act like a boyfriend. When he discovers that he likes talking with you and having you around because he can share his interest with you, he will want you around more, and not because you have a nice rack or smooth cheesecake. The more he matches that “good feeling” with you, then, and only then, are you on the way to sparking romantic feelings within him, the real ones, not the ”I want into her pants” type.