I think we as a fandom don't talk about enough how Ilya is a lover but Shane is a protector! Like yes they both are Loverboys and carers but Shane is ferally protective of Ilya since day 1.
Ilya couldn’t understand what the reporter is saying, Shane stepped up to answer for him.
He felt something was off with Ilya in Sochi, kept checking up on him.
After Sochi when Shane realized how dangerous Russia is for Ilya, he tried to convince Ilya to not go back by asking if it's safe, if he has to go back.
When Ilya opened up about his father, Shane climbed up on his lap and hugged him. In that entire episode he kept checking up on Ilya to see if he is okay, if everything back home is okay.
When they get to the cottage, Shane is taking his bag, making his food, making sure he is taken care of. When Ilya talks about the danger of having a Russian passport and marrying Svetlana, Shane is the one who stays up all night to make them 10 years plan.
When his mom questions Ilya's loyalty to Boston Shane defends him.
This isnt the end. In TLG, Shane defends Ilya to Hayden and JJ.
When the near plane crash happens Shane proposes to show Ilya that he is 100% sure about them.
Most importantly when the Commissioner threatens Ilya and Shane to destroy their career, Shane snaps and says he chooses Ilya.
Shane is constantly making sure of Ilya's wellbeing, planning things for him, defending and choosing him everytime. Ilya is 100% Shane's baby and Shane is an overprotective mother hen which I think is beautiful.