Even if the Hulk dies and defeats another giant, he is still a monster wanted by the military. Letting Betty follow will only implicate Betty, and Hulk already understands when Hulk is caught. Besides, Betty's father was already there at the time, Betty was safe and sound, and the Hulk took Betty to make Betty more dangerous, so it was right to leave alone. In Hulk 2, Banner settled in Brazil, where he learned yoga and controlled Anger, the film says. At the end, Hulk is practicing yoga to control his anger. Banner's green eyes are a sign of the Hulk. But Banner struggled when Hulk transformed instead of laughing now. This can generally be speculated that Banner has been able to control his anger and transform into Hulk. This speculation has been confirmed in the Avengers. The reason is in Canada and not in New York. This is actually quite understandable. He needed to find a quiet place to hide, so he wasn't in New York, so he went to Canada. Betty's necklace was given by Betty. Ross didn't reconcile with the Hulk.
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