POE: I'll come back for you! It will be all right.
Poe really means it when he says this, even though BB-8 is just a droid and considered pretty much a slave (or, at best, a pet dog). What does it say about Poe that he's still willing to go back for BB-8…even if they don't need that map anymore?
UNKAR PLUTT: What about the droid?
REY: What about him?
UNKAR PLUTT: I'll pay for him. Sixty portions.
REY: Actually...the droid's not for sale.
Rey is just as fast on the upswing as Poe, and figures it out pretty quick, too. BB-8 is important to the galaxy, yes. But more importantly, she's willing to give up food for him, on a planet where survival is a day-to-day thing. That's going above and beyond.
POE: Hey, what's your name?
FINN: That's the only name they ever gave me!
POE: Well, I ain't using it! FN, huh? Finn. I'm gonna call you Finn! That all right?
FINN: "Finn." Yeah, "Finn," I like that!
We don't think much of names, but the process of naming is really important. That's why parents agonize over it. Poe is a free spirit, but he knows the meaning of giving his new friend a proper name.
FINN: Now that was some flying! How did you do that? No one trained you? No one? That was amazing! You set me up for it! That was pretty good.
REY (simultaneously): Good shooting! Thanks! I—I don't know!—I've flown some ships, but I've never left the planet! Your last shot was dead on. You got him with one blast! It was perfect!
This is one of those moments that we live for in Star Wars: these two just doing the kind of goofy, spontaneous things that friends do. There's a rule in screenwriting: show, don't tell. This is showing a friendship instead of just telling us that they're friends.
REY: You have to keep going, stay out of sight. I'll try to fight 'em off.
Rey is mirroring Poe's words to BB-8 at the beginning of the film, and it's another sign that she's more than just an owner.
FINN: That's where my friend was taken. I've got to get there, fast!
Now, here's a good friend: the whole galaxy is at stake, with planets blowing up and whatnot, and he's only interested in getting his buddy back. Funny thing about Star Wars: saving a friend often means saving the galaxy, too.
HAN: You okay, Big Deal?
Ah, Han's not so bad. He even makes sure Finn knows that he's a buddy.
C-3PO: Oh, my dear friend. How I've missed you.
It just wouldn't be right not to acknowledge that Star Wars'oldest, closest friends—the first ones we ever see—get their moment.
REY: We'll see each other again. I believe that. Thank you, my friend.
We kind of believe that, too. More importantly, though, it represents a pledge on Rey's part: no matter what might happen to them, they're bound by ties no amount of distance—even hyperspace—can breach.
Almost as if they're going to be buddies in another movie or two.
POE: You completed my mission, Finn. That's my jacket?
FINN: Oh, here.
POE: No, no, no. Keep it. It suits you.
Again, Poe is helping his friend—raised by faceless military goons to be a faceless military goon—find an identity to help him determine who he is. That's real friendship.