Jackson and Serenity were back together again. Why did that upset Lucas so much?

When Jackson hugged Serenity earlier, Lucas felt so jealous that he wanted to pull them apart...

Suddenly, Lucas heard a voice asking, "What's gotten into you just now?"

He looked up and saw that it was his childhood friend, Caleb Moss.

"You're here too," Lucas said.

"Yeah. When I saw you and Jackson earlier, I wanted to come over and say hi, but I quickly realized that the mood here was weird," Caleb said.

Therefore, he sneaked away, afraid he might make things worse by showing up. He observed them from afar.

When he saw Lucas grabbing Serenity's hand, he was prepared to rush over because he was afraid that a fight might break out. However, nothing happened, so he waited until now to come over to greet Lucas.

"You know how much Jackson cares about Serenity Lewis. Don't you remember how mad he got the last time? He looked like he was ready to kill someone. Why would you jump into this mess?" a