"On the boat, I am going to meet a beautiful girl, and I am going to fall in love."
Oh, so romantic!
Two forms used for simple future (to express future plans or to make predictions):
1. I WILL meet a beautiful girl. (activity thought about at time of speaking)
2. I AM GOING TO MEET a beautiful girl. (activity planned or talked about earlier)
MORE EXAMPLES (planned activities):
I am going to play tennis tomorrow. (It's on my calendar. I reserved the court last week.)
I am going to see Tom later. (I talked to him this morning. We agreed to meet at 3:00 p.m.)
I am going to make more coffee. (Earlier I saw the pot was empty. Who drank the last cup anyway?)