Guard (Dark Moon Rising Book 1) by Ellie Pond

Having a hot girl pummel him to the ground wasn’t the worst thing to happen to Flint. Flint knows what this small town says about him. Grumpy. Lone Wolf. Player. He is a firefighter with a rule for one-night stands. Until he breaks his rule for her. Finding out she was a witch only adds insult to injury––he’s had enough of witches in his life. Now if Flint could only stop ending up in fur outside of Emma’s townhouse, watching–protecting. He can’t stay away from the clumsy and sharp-tongued seer, even if they hate each other. His wolf claws at him to keep her safe at all times. The universe wouldn’t be so cruel to have her be his fated mate, right?