BOCA RATON, Fla. — When the lunch bell rings at Boca Raton High School in Florida, 3,400 kids spill into the courtyard and split into their social groups. 
But not everyone gets included. As we first reported in March, here at Boca High and at schools across the country, someone always sits alone. 
“It’s not a good feeling, like you’re by yourself. And that’s something that I don’t want anybody to go through,” said Denis Estimon.
Denis is a Haitian immigrant. When he came here in first grade, he says he felt isolated — especially at lunch. 
Now he’s popular. But he has not forgotten that first-grade feeling. 
“To me it’s like, if we don’t try to go make that change, who’s going to do it?” Denis said. 
So with some friends, Denis started a club called “We Dine Together.” 
Their mission is to go into the courtyard at lunchtime to make sure no …