What could have been on his mind when he saw me?

I can't give you a guy's perspective, but I can say he seems to still have feelings for you. He was most likely walking behind her because he likes you and didn't want to be associated with having a fiance. Hope I helped a bit! Please give me some advice: http://answers.yahoo.com/question/index;_ylt=AqLIx1Dy26fNrVpeOYmnL6vsy6IX;_ylv=3?qid=20110628212743AAexpHR