Group of friends where ML watches FL suffer because of her love

The ML, SML, and FL are part of a group of friends. The ML likes the FL, but she likes the SML. The SML starts dating a girl and the ML tries to help the FL through it since she's sad. Eventually she realizes her feelings for the ML and gets with him.

• Weightlifting Fairy Kim 
• Because it's My First Time 
• Girl and 3 Sweethearts
• Your House Helper 
• Switched 
• Scarlet Heart Ryeo
• Moorim School