If you're feeling burned out and you've put over a year into your current job, I'd highly recommend you consider switching jobs. My own opinion is, if you're not feeling passionate about your work, the first thing to try and change is the work itself!

On the side of speaking to your manager, what's your relationship with this person like? Its easy to see someone speaking to you about burnout as a warning sign that you should consider replacing them. If that's your manager's reaction, you'll need to start looking for new work anyway. I'd suggest being _really_ careful about how you bring this up with them. Make sure you focus on the positives (I love this job, I really like my colleagues, this is a personal issue), over talking about any negatives.

Finally, perhaps this is a good chance to speak to your boss about taking on a new project, or trying a different role for a little while? A change in your day-to-day might make things seem a lot better :)