Oay, so I just read an admission you two aren't close. I can't understand why this is mattering to you. Just accept the fact that he for whatever reason chooses not to include you in his inner social circle. Going to such great lengths to be so upset and wishing to turn this around is concerning. This is almost reaching stalking proportions. Just move beyond this. Again, if you weren't close to begin with this should not be upsetting you so much. A phonecall would have sufficed.