i love Nalu but in a way i like nali more. I know it is all supposed to be nalu but....thats just how i see it. I totally agree with the first one,Natsu knows NOTHING about love. but he shows love in a way...espiecialy to lucy.
READ the manga. Hiro once said that he would've liked a love triangle but he dediceds to um put lucy and nastu together instead. Personily I want a poly r/ship so everyone is happy but I do love Nalu better. I do agree with you though about Nastu knowing nothing about love but I don't see Nastu protecting Lissanna out of angry like he does with Lucy or show as much as repesct with Lucy or SLEEP with LUCY like he does with Lisanna.
Lisanna even said once to Lucy to say beside Nastu. (In the anime and probably as well as the manga)
My personal intake of their relationship is that Natsu and Lisanna were potentially in love in their youth. Natsu managed to get over her death and move on and, after reuniting in their adult years, it has simmered down to a very close friendship, with them still caring for each other a great deal. I honestly can't see Natsu being serious enough to genuinely pursue a romantic relationship for all his loyalty, but I think that Lucy reminded him of Lisanna when they met, hence his protectiveness of her, most notably in the Phantom Lord arc when Lisanna's death was explored. I can't really see a romantic relationship between Lucy and Natsu, I feel like they're more than friends, but less than lovers, if that makes sense - but it's all very subjective and I can understand why people would, and I don't in any way indent to hate you just because of your preferences. In other words, I neither ship NaLu or NaLi, but I won't be too bothered if either become canon.