Yeah, my parents didnt notice anything was wrong and didnt quite believe me when I finally told them, which I did only because I was making a doctors appointment and I'm still on their insurance. I'm about your age. One of them warned me about the stigma of being on anti-depressents. Right, like I want to be feeling this way and want to be on medicine.
And yeah, one of them never talks to me about it, the other has just started trying. They don't know how to handle it.
Perhaps sharing some factual information from credible sources will help?
*hugs*