There is no “love triangle” in Star Wars OR Empire. In ANH Han only says he’s interested in her to wind up Luke. Luke is the only one to show any interest in her but there is nowhere that Leia shows anything more than friendship towards Luke. The kiss on the cheek during the chasm sequence is nothing more than a kiss for luck. In ESB Leia only kisses Luke in the medical bay to wind Han up. The kiss she gives Luke after they rescue him is nothing more than a friendly kiss. She has already announced her love for Han by this point. Luke doesn’t show any romantic interest in her at all.
Yet when we get to ROTJ, Han suddenly thinks Luke is a rival and becomes this jealous idiot? All that has to go. Han became a pretty much useless character as it is in Jedi, but this jealousy crap put it over the edge.