I don't recall Nick being all that gregarious with anyone outside the scoobies. Maybe someone can enlighten me on what relationships he had in seasons 1-4 that were eradicated once he became the serious, sober and no nonsense grimm in season 5.
The other thing that points to no changes in Nick, in my opinion, is his relationship with Adalind. As I stated before, it appears to me that all the two women did was change places. If, as pointed out, Nick became more suspicious, more serious, and more remote, then he would not have taken Adalind freely into the house and then into the fome with him. He certainly would not have trusted her with his child and would have fought long and hard to gain custody of the baby.
The other thing that points to no changes in Nick, in my opinion, is his relationship with Adalind. As I stated before, it appears to me that all the two women did was change places. If, as pointed out, Nick became more suspicious, more serious, and more remote, then he would not have taken Adalind freely into the house and then into the fome with him. He certainly would not have trusted her with his child and would have fought long and hard to gain custody of the baby.
The best way to frustrate a cyberbully is to ignore him.