He's your bestfriend.. well you also like him. he's very popular so he tends to hang out with other girls other than you.

his birthday came up and he threw a party. When you got there, it only took him seconds until he ran up to you. You gave him your gift and he happily brought you and introduced you to his friends. Later on, a girl suddenly talked with him and a smile was plastered on his face as they talked for a long time. You suddenly felt this sting of jealousy and decided to leave