"loving a grimm is never easy but it's worth it"
The series has never shown this to be a fact, especially on the Burkhardt side. Look at Nick's mother. No one ever came forward, including Nick himself and stated that loving her was worth it. What about Aunt Marie? All Nick himself can say about her is that she was like a mother to him.
Even the women who lived with Nick daily never comment on what it is about him that makes loving him worth it.
Finally there's Trubel herself, which, thankfully, the series never had pair up with anyone.