You are right of course. Many of the truths we cling to depend greatly on our point of view.(Ah got a good Obi Wan reference in)I see your point, and as it happens can relate to it. When I lost my fiancé and best friend of four years nothing mattered anymore. Though I had success at everything else much like Robert did there was no satisfaction or joy since I lost her, nor is there now, why I gave up everything and joined the army actually but I'm digressing. So you might be right, save Lyanna did not feel for him what he felt for her. I think she fell in love with Rhaegar for whatever reason.
I did like how in the show they expanded on his view a lot as in the book we just have glimpses. I must say with season 3 I'm very disappointed at the deviations from the books though, especially with Stannis's character.