Dude I was EXACTLY where you were not that long ago. I started my log when it happened. I was severely depressed.
DO NOT, I repeat, DO NOT fuck with your hormones when you're feeling like that. When I shut myself down after I cycled off (somewhat improperly) my depression got exponentially worse. Also man if you wind up having to take an anti-estrogen that's going to make things much worse too.
Get in the gym and go fucking ape shit. I am a firm believer that any emotion, be it happiness, sadness, anger, can be used to throttle your workouts to a new level. Getting in the gym and destroying your body will definately help with the depression.
Trust me bro I know it's so hard to get motivated, you probably feel like sleeping all day. With the right mindset and mental discipline you can learn to take that depression out in the gym. My own body is a manifestation of the emotions I let out at the gym.
Also man, the break up, go out with friends. I became a recluse after my break up and it made things worse. After I started going out, FORCING myself to be social (because I didn't want to socialize) things started to get a little better. You need those kinds of outlets in your life.