I'm confused about the Beetlejuice cartoon

[Courage the Cowardly Dog]

I've been trying to figure this out since I was 4 years ald and wearing beetlejuice PJs. What is the relationship between Lydia and BJ? They always say they are each other's best friends but is there supposed to be something romantic going on there? A little goth on ghost action? It's like they keep implying it but....not implying it.