I don't think you should pay much attention to your depression and its telling you whether it's a stupid idea or not to go to college. You are taking lots of very hard, advanced classes. As Christina says, stats is certainly needed for studying psychology, as most psych courses aren't really the interesting behavioral and counseling courses one would think but are difficult science courses where one has to understand brain chemistry and how the senses work and how to do experiments where the "math" of statistics get involved.

I think if you are interested in psychology and might like to study it in college later (I wouldn't worry a whole lot about getting in or whether you'll get a PhD right this moment; you are taking courses that will get you "in" to good colleges no matter what and you don't quite have to plan for what's might happen, what you might like 10 years down the road) I would get as rounded an education now as you can because with each year, one has to narrow the field of what is studied until you will just be "thinking" psych courses.

That being said, I would also work on having more "free" time or not taking a whole lot of courses/courses that are extremely time-consuming as that sounds like a lack of balance at this time. As time goes on, one doesn't get as much chance to take courses one might just enjoy or pursue interests just because one is interested. I would leave time to take "fun" electives and/or join a group/club and work a little bit on seeing what you can do to help with the depression. It may/may not be with you a long time and working on coping with/alleviating it now so you can better apply yourself later, might be a good idea?