Unfortunately, I have found that many people (especially older generations) still stigmatize mental illness. In my experience younger people are, in general, much more open-minded ('though some younger folks seem to stigmatize use of psych meds).

I'm wary of opening up too much to people, because I've had the experience of being called 'sick' and 'crazy' by certain family members who opted not to face some truths about themselves and chose, instead, to point fingers at me.

On the other hand, I have received support from friends and family members who are themselves in treatment.

So, I guess it all depends upon who it is you're opening up to. Best of luck, with whatever you choose to do.