This is going to be a bit...messy? I am just going to write how I feel and it may be a little all over the place.

I've been best friends with Elsa since we were freshman in high school. She has always had horrible relationships--guys who abused her or treated her terribly. Then she met Christoph. At first, I thought he'd be just another crummy boyfriend, but it turned out he was the best thing to ever happened to her. They got engaged after a year. They are not the perfect couple. Elsa has many mental health issues and needs caretakers, and Christoph was a recent traveler who decided to settle down. They moved in together, but they were always fighting. It wasn't too long before I realized something...Christoph would be better with me. Every time they fought, that's what I would think. Elsa was the issue, not Christoph. She was weighing him down, but she was my best friend and I told myself I would never come between them. Three years past, we were all close friends. They were my best friends. I got along with Christoph very well, we had great chemistry. He'd get all my jokes and I'd get his. Things weren't going so well for Elsa and Christoph. Their fighting was to the point where Christoph was always on edge and his stress level was high. They both told me they wanted out of the relationship but didn't know how. So a couple months ago after a breakup and then getting back together with Elsa, he confessed he was in love with me, and I confessed I was in love with him. Our biggest priority was Elsa. We both really care about her and didn't want to betray her or sneak behind her back, so we agreed we'd just act "natural". They went back to fighting again and it was getting worse, and it seemed like they were planning on staying together. Tonight, I met Christoph at the local bar. We spent a good while talking, and we both wanted to be with each other, so we agreed to tell Elsa the truth, that we were in love. I drove to their house and we sat her down and told her. We told her we both cared about her and wanted to do what was best for all of us, even though it was hard. She was devastated and really upset. It's hard for me because she was my best friend and I really care about her, but they weren't happy together and I really think that it is for the best, but I feel like such a bad person because I betrayed my best friend. Christoph and I never did anything sexual, and we were upfront to her and told her when we were both ready to move on, but it feels so wrong to do something so horrible to my best friend. Does this make me a bad person for backstabbing my friend, even if I think that it would be best for all of us?