That's what always happens when you trust or love someone blindly. It's not wrong to love or believe someone, but it's wrong to do so blindly. This applies not just here, but in real life too. You can't truly know someone's intentions in just a few days... sometimes it takes a lot longer, and even then, you might still get cheated. So, prioritize self-protection. Build a wall around your heart and don't let anyone break it easily. I know you might think it's easy for me to say all this, but trust me, I'm speaking from experience.