Luke was at his locker when Manny walked up to him. Since they were so close, they were able to talk about anything really. Manny heard through the grapevine that Luke had a crush on somebody and he was really eager to learn about the relationship and wanted to help.
"It doesn't matter anymore"
"It does matter"
"She has a boyfriend, I think."
"Last time I checked she had over protective bothers and that's it"
"But theirs all these other guys all over her, and I can't get a girl like her"
"But you can, I can help you. Don't you remember that I'm the romantic one in the family?"
As the conversation went on the bell went when they realized that they had to head to class or they would get in trouble. They agreed upon that Manny would assist Luke with getting Tess. After all, we know that Manny has more game than Luke does.
As time goes on, the rest of the family found that Luke had a crush on Tess.