emotional punching bag
When another person, typically the person you like, uses you to get rid of all their problems (anger, frustration, sadness etc.) and could care less about you.
This girl I liked treated me like an emotional punching bag. She always came to me when she had problems, but never really cared for me.
Emotional Punching Bag
When you let another person, typically the person you like/love, uses you to get rid of all their problems (anger, frustration, sadness etc.)
e.g: Mushu would like to be Luna’s emotional punching bag. Luna is going to accept this and have herself a super cool emotional punching bag 😬