Jealousy, Jealousy

This is a story about y/n barton, the daughter of Clint and Laura barton, she's the oldest, the only one living in the Avengers tower. Why? Because she is dating the one and only Bucky Barnes, they kinda just wanna keep it on the low so not that many people know. Little does she know that Steve Rogers also has a major crush on her.
When he wants to ask her out, everything backfires when Steve catches y/n and Bucky together, and suddenly their "secret" relationship is not that secret anymore, and Steve's heart is shattered in a million little pieces, leaving him with a lifetime of guilt, and jealousy...