Disclaimer: This might contain some spoilers, so read this at your own risk
Rocket, you are not alone Rocket. You have a family. You have Peter, Groot, Nebula, Drax, Mantis, and Gamora. Just like your name Rocket, look at how far have you gone and have been, how high have you flown.
They show you Rocket, you are not just some Racoon. You are their family. They love you.
And last but not least, Mantis looks so hot and cute.
-By Far one of the best MCU Movies after sometimes, the first MCU Movies that made me cry in the theater.
Extra: In the Scene when Pom cries watching Rocket's backstory, I'm pretty sure she actually cries and not acting. Only some people will understand what I'm saying here