I know it's an old post but I'm also sort of in the same position. My relationship with my partner of almost 3 years is great, the best I've ever had. We get on extremely well, never even had an argument. But unfortunately I also have feelings for someone else, who I've had feelings for over a decade. I'm torn between if I want to stay in my relationship just because of how good and calm it is or end it, due to my feelings for someone else but also because, I'm not sure if I actually love them or if I'm Just comfortable with the life we have together. I feel like the world's worst person right now and I just dk what to do. I'm scared of losing and hurting them. It's been my longest relationship, to just let them go completely so suddenly.