The 'Rivers of London' series has some werewolf elements in its urban fantasy setting. The relationships between the characters, which sometimes involve a touch of romance, are set against the backdrop of London's magical underbelly. The werewolves in this series are not the typical ones, and their unique characteristics add an interesting twist to the story and any potential romances.
There's also 'Moon Called' by Patricia Briggs. This is part of the 'Mercy Thompson' series. It features werewolves and their complex social structures. The main character, Mercy, has a lot of interactions with werewolves, and there are romantic subplots that develop throughout the series. The way the werewolf lore is integrated with the modern - day setting makes it a great read for those who like romantic fantasy with werewolves.
A popular one is 'The Iron King' series. While it mainly focuses on the fey, there are werewolves in it too. The series has a great blend of romance and fantasy elements. The interactions between the different supernatural creatures, including werewolves, create a complex and interesting world for the romantic relationships to develop in.