A lover who doesn't mind revealing the relationship, and me who wants to keep it secret

During a drinking session with my coworkers, I'm asked to join a hastily organized group blind date, but when I decline, they become suspicious that I already have a partner. Just then, my boyfriend conveniently contacts me, and I end up confessing the secret. While I've been keeping it hidden from everyone around me, my boyfriend is a capable supervisor in the sales department. It seems he has no intention of hiding our relationship... and now that I've revealed the secret to my coworker, my peaceful life is about to come to an end.