What Anakin may know about the death of Amidala

I think having a love triangle would not be a good idea. You saw no hints of Obi-Wan having any feelings for the queen or vice versa in TPM. I could see maybe Palpy making Anakin think there was something going on, but Obi-Wan just doesn't seem like the type to cheat with the woman of his apprentice.

I totally agree with you, JM38, although it may not be cheating that goes on. Perhaps Amidala just has great feelings for Obi-Wan, although no intimate relationship takes place.

Or maybe they're just close friends..and Anakin feels threatened by that.

Yes good point. I still don't think there should be a love triangle at all though. It doesn't seem very Star-Wars-ish.