分手你就是给我放箭
[fēn shŏu nĭ jiù shì jĭ wŏ fàng jiàn]
This implies the user feels deeply hurt by a past break-up, where 'giving an arrow' signifies being pierced with pain and sorrow caused by their former partner when they ended the relationship. In essence, every time they part ways it feels as if they've been shot with arrows. So the person here uses such a vivid and dramatic description to convey the heartache from breaking up.