A) What bothers Two-Bit about Ponyboy busting a bottle when the Socs threaten him, and him feel better? B) How does this relate to the Frost poem “Nothing Gold Can Stay”?

Two-bit thinks that it isn't in Ponyboy's nature to be so violent. He thinks that Ponyboy is better than that and destined for better things than fighting. This ties in with the Frost poem because even Ponyboy has trouble staying "gold": in this case hanging on to his empathy and innocence.