This conclusion is actually quite obvious. First of all, it's not long since Bones confessed to him, so it's hard not to think about it.
Secondly, it has been repeatedly emphasized in the TV series that Booth is a people person. His ability to read people is super strong, and even his royal psychology children admire him, and Bones also said, "I am good at dealing with science, you are good at dealing with people. , I won't argue with you in terms of dealing with people." So Booth knew very well that his girlfriend didn't agree to the proposal, and to Booth, it was just an excuse. When his girlfriend expressed his willingness to move out, he immediately asked "how long does it take to move", which shows that he can't wait.
One might ask, didn't Booth confess to his girlfriend right after Bones confessed to him? And when Bones knew that Booth broke up, Booth didn't immediately express that he wanted to be with Bones. Except for the factors other than the plot (there is no ratings together), these two actions reflect Booth's cleverness:
First, after Bones confessed, he immediately confessed to his girlfriend, which prevented his girlfriend from having to break up later. Any doubts that might arise (for example, why do you still ask for marriage when you know I can't agree at the moment?), any doubts his girlfriend has of him, will come down to something other than a suspicion that Booth wants to turn his back.
Second, if Booth offered to be with Bones right away, Bones would probably agree (which was Bones' motivation for asking him "What's next"), but obviously he wouldn't be that stupid. First of all, this will make him stand in front of Hannah. Second, colleagues in Bones' lab will look down on him. Third, Bones and Hannah are still friends. It is inevitable that Hannah will put Booth bad water in front of Bones. So change your mind. Third, Booth obviously knows that his relationship with Hannah is so stable that Bones obviously won't wait for him for a long time and find another good match. So he was in a hurry to break up with Hannah, which gave Bones hope that Bones wouldn't be looking for another match for a while.
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