I agree with Vash.., non-threatning confrontation is the best.., YOU should make it a priority to go up and talk to him.. face-to-face.., in person..
Tell him that you know what is going on.., that you're just there to talk.., and that you came there to tell him to stop.., that you find it disrespectful.., and that Amanda finds it uncomfortable.., and that he sould realize how wrong it also looks for him to be doing that and for everyone else to hear that he's that type of person.., it doesn't look good for him.., so hopefully he'll see that it's better off for everyone if he stops doing what he's doing.. and that you nor Amanda will hold it against him.., that you can both just put it behind you now.., as if nothing happened.., and just have things back to normal..
(truth be told.., Amanda is most likely the only girl he feels he stands a chance with.., and now that she's gone.., he feels he has nobody else.., and is looking to get her back.. so don't be shocked if he's not exactly too happy to be around you.., you are afterall who took that positive feeling away from him)
This is pretty creepy.., some guys.., shame on them.. pathetic really.. disgusting.., makes you ashamed to be a guy..
Best,
GrkScorp
If you can't stop the Wind, then you can't stop the Storm.