Actually he did really love her, but Lyanna knew from his nature that he would never be satisfied with just one woman, despite the fact that he did indeed love her.
No one know what it looked like. We know she left with him and that assumptions were made about the nature of that. Of course Proud Robert to whom she was promised, and probably also cared for, believed that the only possible situation was that she was kidnapped against her own will. And again, young people doing thing over love/hormones isn't such a crazy concept. Neither is not thinking through the potential consequences, and this is perhaps more true of people in influential positions or places of power.but then again she was the one to leave without so much as a warning into what looked like a kidnapping
Oh yes, because two lovers running off is bound to result in Brandon riding to the Red Keep and demanding Rhaegar show up to die, resulting in the Mad King doing his perverse thing that he did. Rhaegar and Lyanna might be indirectly responsible for that, but it was Aerys' actions that ultimately led to the war. Imprisoning Brandon and his mates, then demanding that their fathers show in court to answer for their actions, only to put almost all of them to death in one form or another and THEN also demanding that their heirs be executed (ie Ned) at which point Jon Aryn refused and basically the only option was to openly rebel. That's like ultimate worst case scenario and I'm sure that young people in love don't see or recognize the potential for such a thing happening.caused the death of Roberts bestfriends brother and father, and plundged Westeros into civil war. Lyanna and Rhaeghar were horribly selfish, and together with Aerys justified every action Robert took after the fact until his marriage with Cersei.