What to get my girlfriend for her birthday?

OK so her birthday s in July the 15th. And I really dont know what to get her. Shes a huge John Mayer she loves the Florida Gators and im a florida state fan. Shes so amazing abd beautiful and I love her so much. And we are in a I love you more thing fight. Im in California for the summer visiting my mom and I told her when I get back im gonna prove i love her more. So can incorporate that into a great present? I dont wanna spend a ton of money not more than 150 bucks. Thanks!