As a person suffering from depression playing this was a very bad idea
Obviously the following is only my opinion, but...
I felt that the first time I played it back when it ended at the first bridge scene and for that reason I didn't play it again until it was finished.
Did you make it through the whole game? If not, that's ok, Take some time away from it if you need, there is nothing wrong with that, because knowing your own strengths and weaknesses is critical to managing depression.
It's great to know your limits and grow slowly, but some day, when you're feeling stronger and know what's coming ahead of time. I strongly encourage you to come back and finish the game.
It is all handled very well! No miracle cure, everything is fine now crap, but still a strong and uplifting ending, for pretty much everyone no matter which path you choose... unless you don't hook up your bro Chris when you have the chance. In that case he's pretty much screwed.
But seriously, take it from a guy who's delt with depression for over 30 years, survived 3 full fledged attempts(my first attempt was 30 years ago this March), been institutionalized twice for depression, been divorced 3 times, just fought a kick ass battle with cancer which is still waiting 2 more years to be prognosed as in remission, still single and so fucking tired of being alone, and still struggle with depression often.
But then I look at the other side. I have a son who's amazing. I have a job, I have a car, I have a home. yeah, some things in my life are complete shit, but in so many ways I am blessed.
So, after all of that, what I've learned is that with both life, and Leap of Faith, is that, yeah, you can give up and quit in the middle, but if you can struggle through the hard parts, the ending is definitely worth it.
Just my piddly little 2 cents.