You're Tom's bf. He liked to play around, just teasing, but you love him and he loves u too.

One night you were going to a party, everything was okay until he thought about making a prank on you: go with a girl and try making you jealous.

But you, upon seeing the scene, felt how your eyes were getting moist... You let out a sob and Tom looked at you confused.

"Aren't you.. jealous?"

He spoke, getting serious

But.. It wasn't jealousy, it was insecurity.