Hummmm how can I say this, in a way, do I understand their point? I, for example, sometimes go out with people in a casual way, and yes, I make it clear that it is casual, that it is not something that will be serious and such, and the other person agrees, like: when one no longer wants, we break, but then, when I "get tired", there is no longer that tcham, the person comes to ask me for dating and I look like "but, it wasn't serious, so I'm sorry, but I can't go out with you..."
Just as the other person becomes the victim, imagine what it is like for those who are breaking up, because you look like the villain of the story and all this is because you don't want to hurt the other person even more, but as in my example, I already stipulate that it will not be serious, but then the person says: but I thought I would be different from the others. But now tell me, if all of Erika's boyfriends already knew the rumor of 3 months of dating, why did they even bother to date her? From the moment you go out with someone who knows you are a playboy or who does not have serious and long relationships, you need to prepare yourself and know that you will not be that special being and such, sorry guys, but I don’t think it is entirely their fault that the others have a broken heart because of the separations, if you play with fire, you know you’re going to get burned, but do you blame the fire? No, you blame the person who got burned, knowing that the fire burns. I even understand Leonardo, because apparently, Erika took over the 3 months business after breaking up with him. And the 3 months I think is a good probable time, because there are studies that show that the passion lasts around 3 months, so it is more or less that desire to be with someone, but after 3 months it passes.
But yes, if you both agree on a casual relationship, then no one should blame the other for wanting to break up and not feeling anything for the other...