He was the first one to fall in love. Tiana didn't even realize it untill ray tells her, also when she talks about "our" restaurant Naveen thinks it's him and hers

Eric falls for Ariel twice! And the second time, he was already hopelessly in love with someone else (he thought). Of course, later on he finds out that Ariel and "the one" are the same girl, so he's literally 200% in love with her.

I can't choose the other ones because i consider them humans and "what" applies only to Naveen ;)

He's ridiculously in love with Tiana.

Also Phillip, Adam, Naveen and Eric.

WHY can't you find men like them in real life?

and Prince Adam. They died for the girl they loved.

Eric fell in love with Ariel BOTH as his dream girl and as a real person. When in the end all the pieces fell into place and he found out it's always been her I'm sure it made a way for his love to be even stronger. Also Eugene/Flynn because he died for his girl (not even for her life, but for her freedom) and changed his entire life for her and would pretty much do anything for her at any cost. I never bought into Naveen's feelings for Tiana, imo they came completely out of a blue and were not even that strong because he actually considered marring Charlotte both in the beginning and in the end (I don't see how a guy in love can even consider to marry some other chick, even if in the end he believed it would break the curse for both him and Tiana... still weird and wrong).

prince Eric of course.he's cute:)

Prince Adam because he hated Belle in first sight