How do i get my ex boyfriend to want me back?

ok. so he broke up with me (over text during STAR testing) a little over a week ago. i love him and want him back, but more importantly, i want him to realize what he is missing out on. now, i know i have to cut off all contact, and i have, but the thing is, we have a class together, and are sharing a pig pen for a school project. how do i avoid him if we are together sometimes.? helpp.