<human>: Can you condense the text into a few key points?

My girlfriend [23/F] and I [20/M] have been together for five months. She's honestly the most compatible woman I've met. We're both a special kind of "weird", and I feel like I belong when I'm with her. I never run out of things to talk about with her all night, while my conversations with other people often fall short. My girlfriend is like the other piece to my jigsaw puzzle that I finally found.

This semester, and to a lesser extent last semester, I noticed a huge change in my mentality. I lost all motivation, it was extremely difficult to absorb information, my sleep was messed up, and I felt "empty" on most days. These mental changes were more severe than what I experienced during puberty. My grades tanked hardcore. I went from a 3.8 GPA in one of the most difficult degree programs to getting a 2.5 (or possibly less) for this semester's GPA at 7 credit hours. 

At this point I realized I needed to get help. I saw a psychologist who diagnosed me with depression and put me on a treatment plan. I started going to group therapy sessions this week, and I'm religiously following their suggestions. I'll also get medication after a few weeks of group therapy. I'm dead-set on following the treatment plan to destroy my depression.

I'm worried that my depression might wreck the relationship in the meantime. Many people list clinical depression as a dealbreaker, and it's been known to destroy existing relationships. So far I've managed to hide my symptoms from my girlfriend because I feel great when I'm with her.  However, I need to tell my girlfriend about my depression eventually. 
	
I'm deciding between talking to my girlfriend about this now or after my depression clears up. Informing her after my treatment takes effect will show that I gave a fighting chance instead of wallowing in self-pity. Telling my girlfriend now will be better communication for our relationship, but at the same time she might feel that the end to my depression is so uncertain.  I know this sounds cliché, but it will be extremely difficult finding another woman as compatible as my girlfriend if she leaves me.
<bot>: I got diagnosed with depression. I'm dead-set on following the treatment plan, but I'm worried about how it will affect our relationship. When's the best time to discuss this with my girlfriend?