Can I lie to my doctor about my depression symptoms?
Why would you lie to your doctor about your symptoms?
He doesn't know then what he knows now.
I understand it can be hard to open up about mental health issues, but your doctor is there to help. If you're not honest with your doctor, they can't properly help treat you. Being honest about your depression will help your doctor get correct treatment plan for you.
I don't like to tell people that I feel like dealing with this on my own.
It is understandable, but ultimately if you are strong enough to go to them, then the next step is to be honest. You are strong enough to do it. Be honest about your feelings of apprehension and allow the doctor to earn your trust.