Padme is doing her best to not like her best friend, but it s hard. What advice

Padme is doing her best to not like her best friend, but it's hard. What advice would you give her? He just turned 18 and she just turned 16.
He looks like a cross between Stefan Salvatore and Young Hayden Christiansen. He is very very sweet to her, tells her he loves her, she loves him. But he loves her like a little sister. She liked him before and then they took a break from talking and drifted apart. They are starting to reconnect and she is trying not to like him.
What should she do? Write at least one sentence helping her out.
Please please please help a girl out here.