This contains Season 3 episode 16 spoilers, you have been warned
Shaun was super nervous, he was going to confess his love for Lea, he was worried that she wouldn't feel the same about him and he was also worried that their friendship would be ruined if she rejected him, Shaun didn't say anything for a few seconds before he finally spoke
"I love you, Lea," he said, "And I want to be your boyfriend," Shaun felt some sort of relief after he had said that, he had loved her for so long, and he never said anything about it until today
Lea was silent for a little while, She had a feeling that Shaun liked her, but she wasn't exactly sure if he actually did, she continued to stay silent before finally getting the courage to say something
"I love you too," she said, "And I want you to be my boyfriend, too"
Shaun was surprised at this, she actually felt the same! he definitely wasn't expecting this, he was expecting the worst, but he got the opposite of that, he got the best.