난 and 나는
+) 사랑이 난 겁이나는데
+) 마주보면 난 또 웃게돼
I think the first 난 means that difficult and the second is 나 는, is that right?

Question

Answer

That is a part of lyric 페이지원

사랑이 난 겁이나는데 is inversion of 난 사랑이 겁이나는데
마주보면 난 또 웃게돼 is inversion of 난 마주보면 또 웃게돼
Both the first and second are equal and short form of 나는.