I agree. As hard as it is to hear, time is the best and really only way to heal. There are things you can do with that time: distract yourself with things you enjoy, spend less time on the social networking site, engage with other friends or make new ones (I know you said you are shy/introverted but perhaps you can put some of that courage you had when approaching the subject of your affection into finding a new friend). I'm sorry you're going through this, though. Getting over someone you care about is difficult. Possibly one of the most difficult things there is.