I'm Japanese, visiting my boyfriend in the US for the first time, staying with his family for about 40 days. We've been dating for a couple of years, but this is the first time I'm going to America. He's always been the one to visit me, because I was a student and did not have enough money to visit him. But now that I graduated and have a job (part time), I've got enough money saved up to visit him in the US.
However I'm very worried about entry in America, worried that they will force me to go back to Japan, especially because I'm planning to stay for so long.
So I thought of a plan, which is that I buy tickets for a two-week trip (for example October 7 to 28) and after I enter the country, I change the return flight date to November 16. Of course it will cost more, but I really don't want to get sent back to Japan.
I would appreciate it if someone could give me advice on this issue and tell me if my strategy would work or not.