Rumple knows Belle is his happy ending ... and he's determined to get his. I think he's going to do whatever he can to get
back to SB ... to Belle. And Belle was directed to the clock tower because of the goblet thing ... it directed her to Rumple's greatest weakness - the dagger, which he had with him. He was just distracted with what he was doing and she picked it up. I'm actually glad that it didn't reflect that she's his greatest weakness - she's his love and his strength. His weakness is his dagger and his desire to be free of it, but hold onto his power.
when she tearfully commanded him over the town line even as he was quite literally begging her not to.