No, I'm not "just" depressed. You haven't "been there" unless you have bipolar disorder. Here's some handy info from MHA
The 1/5 statistic should be enough to prove to you that bipolar disorder isn't just a case of seasonal depression. It doesn't feel like that. It's... crushing. The weight of it hurts. Idk how else to explain. But people with bipolar know, I think.