I didn’t know about it when we first met but he did tell me after the first date.

I asked him to tell me about everything- all his encounters and all details between them. He told me it was for a brief period of time and my sister was not interested as she liked the guy she was arranged to marry then. So he talked to her about his feelings drunk. It changed their dynamics a little, created distance between them, and with that, the crush ended. He said he started seeing how she behaved in general with everyone and saw her bossy nature and general rudeness. He said that he had absolutely no feelings for her after that. And since my sister was never interested. I felt it wasn’t a crime to like someone especially if there was no actual romance between them. So, I asked him to be honest with me about everything, no matter what happens and I would do the same and that was an unspoken rule between us. It bonded us in a very strong manner I guess because even when we took breaks,  even then if something happened, we used to tell each other honestly about everything.