It gets better. Everything's going to be okay in the end.
I could write a book as to why and how, but nobody wants to read an entire book in a forum post. Here's something to consider though: if you let depression - a depressed mood; a depressed state of being, become so familiar to you that it's part of your "comfort zone", any attempts you make later on to be happy, or at least be anything other than depressed, are going to be sabotaged by that fact.
We Aspies love our comfort zones; we don't just love them, we need them to maintain some sort of psychological homeostatis. But when depression becomes a part of that homeostasis, it starts to feel "wrong" to feel good, if that makes any sense. It's why depression is chronic and self-reinforcing, even if it is worse at some times than others.
It's precisely by that mechanism why a chronically depressed state will only get worse when circumstances call for a coping mechanism - because depression is part of an Aspie's mental "comfort zone", the natural inclination will be to cling to it even tighter. In that way it seems to act like one of those stims that gets "worse" when you get more stressed.
I don't know, does any of that hold water with you? If it makes you feel any better, even though I've largely erased my own depression as a significant personal issue I still have some bad days. Everyone needs some support to get through, from time-to-time.