Breakup Advice: The 21 Most Painful Things About Spitting Up, According To Twitter

After a split, we all have those moments when it hits us -- sometimes out of nowhere -- that our relationships are really, truly over. Anything can set it off: Maybe you drove by the little restaurant where you went on your first date, or perhaps a friend let it slip that your ex is seeing someone new. On Wednesday, tweeters used the trending hash tag #WhatHurtsMost to discuss post-split moments just like the ones above. Click through the slideshow below to see what they had to say, then head to...