"There are two types of beings in the universe: those who dance, and those who do not." "I get it, yes. I am a dancer, Gamora is not" "You need to find a woman who's pathetic, like you." "Thanks, buddy."
Drax tells Peter that he has to make a move on Gamora, for heis the one who "dances" in the Galaxy and Gamora is not. He actually encourages Peter to engage on Gamora and gives him a hug in the teaser trailer.
Peter's adoptive sister through his father, smiles when she learns that Peter has romantic feelings for Gamora and reveals it to everyone.
Rocket at first doesn't seem to care that Peter has potential feelings for Gamora, shown when he tells Peter to just leave Gamora to die and save himself and forget Gamora altogether.