1)
Why does it say "v'Hechezik Lo"?
1.
Radak: This is like v'Hechezik Bo. Also "Lifneichem le'Charev" (Vayikra 26:7) is like be'Charev.
2)
Why did he hold him and kiss him?
1.
Malbim: He showed humility; he considers the man his equal.
