Sympathy Crush 

when all you want is a friend but they catch feelings and you feel the need to like them back

"I thought we were friends but then I realized he liked me, he was just so nice so I got a sympathy crush"

Sympathy Crush by Sympathy September 15, 2015

Sympathy Crash 

To attend a party without an invitation out of pity that very few people have turned up.

Hey man, you should sympathy crash Jeff's party, there are about three people here.

Sympathy Crash by B1gCal June 22, 2010