Been with my gf for about 6 months. Long story short, I am in love with someone else who is also in love with me. I have thought about it a lot and have decided I need to end things with my gf and start a relationship with the other woman. My gf is going to be totally blindsided. I feel horrible... She is a good person, just not the perfect match for me. How do I let her down as gently as possible? I feel like I have to be honest about there being someone else, though I know that's going to hurt...
Any advice?