friends since forever‚ until now

Wonhee and Iroha have been friends since they were kids. They grew up together, shared everything, and were always by each other's side. Over time, Wonhee slowly started developing feelings for Iroha, but she never had the courage to confess. She decided to keep it to herself because she was afraid of ruining their friendship.
Now they're in high school, and things have changed. Iroha has a boyfriend named Jake. He's kind and makes her happy, but seeing them together makes Wonhee feel jealous and hurt. She tries to ignore those feelings, telling herself that she should just be a supportive friend.
Instead of talking about it, Wonhee starts distancing herself. She replies less, avoids hanging out, and acts colder than usual. Iroha doesn't understand why her best friend is pulling away, and she thinks maybe Wonhee is just busy or stressed.
What Iroha doesn't know is that Wonhee is only stepping back to protect her own heart.