Thanks for the responses, everyone. They, and the warm welcome, are very much appreciated.

Turtleboy: Interestingly enough, I don't believe in a good/evil view of things. Good things happen, bad things happen, things at all points in between happen. It certainly wasn't a kind act for her to do what she did. In fact, it was terribly unthoughtful, uncaring, and possibly malicious. I think there's a lot of truth to what you (and several others) are saying in general, though. The mental health issues have probably been with me a long, long time, but the stress of these events pushed moods to the extreme. I do have some peace in my heart, mainly due to the extremely positive support of the family and friends I've revealed my story to. That said, I've been sort of burned on this and I don't believe I'll give marriage serious consideration again. I'll be a father, sibling, son, and friend, but the thought of "husband" makes my blood go cold. I know time may change my perspective, but this is where I'm at currently.

Espurr1989: I'm intelligent and well-read enough to know that polyamory can and does exist in a healthy form. Trick is, the individuals living the lifestyle need to know themselves, excel at communication and empathy, and maintain fairly decent ethics to pull it off. What my wife and I had was not polyamory, it was an abusive relationship where I stayed monogamous and she did whatever the heck she wanted. I don't wish to conflate true polyamory with my... situation. They're not the same. I'm sorry to hear about your situation. Based on my experience (which I seem to have learned in one of the hardest ways possible) it's best to live who you are and to be authentic to yourself. I wish you the best of luck navigating your feelings and relationship(s).

Trippin2.0: Thank you for all your kind words. I barely managed to life it some weeks. I'm incredibly thankful I'm still here. I like living. Quite a lot, actually. I hate being depressed. I'm going to do whatever I can to minimize the amount of time I spend in the hole. If that means completely rebuilding my life then it's what I have to do.

JustMeJen5294: I've always believed my brain and intelligence are my best assets. Without them I'd be in a lot worse shape than I am now. I am incredibly thankful I'm as functional as I am. I think about how many other people are out there trapped in situations like the one I just started pulling myself out of and my heart weeps. That said, too, I'm not endorsing how I've had to handle my symptoms and treatment. I firmly believe that whenever possible psych care and/or therapy (ideally both) should be present. I did what I had to do to survive. :\

Innerzone: I try to see my silver linings as hard as I can. The way I'm looking at it is now I know what I can handle. If I can live through an extremely horrible relationship like this one, I can do pretty much anything, haha. It works similarly to physical pain (at least for me.) I've had kidney stones before. No pain has ever come close to the pain of kidney stones. It's sort of re-calibrated my experience of physical pain. Things that would have hurt a lot before don't have as much of an impact on me now.

sidestepper: I'm definitely going to get hooked up with a pdoc *and* therapist again in the very near future. Looks like I'm going to be gainfully employed within the next two weeks, which should come with health care and the dosh to pay copays. It'll be a real breath of fresh air, that's for sure. Completely agreed on facing consequences. Like I told my father in law, "She needs to learn that a man reaps what he sows."

lunaticfringe: urgh... yet another reason I'm extremely reluctant to consider a long-term relationship or marriage again. I think you're spot-on.

Supanova: Brains are amazing, and I love exploring them!

Sunnyhunny00: I'm only just realizing in the last few weeks how strong I am. My wife's family and I are working on trying to convince her to get into therapy. She certainly has some significant personality and mental health issues and would benefit from trying to understand them, even if they don't get resolved. It might sound odd that I'm wanting to encourage her to do this, but she's always going to be in my life in some capacity because of our son. I want her to be the best mom she can be for him. He deserves that, and I'm going to fight for him. My backbone is the strongest it's been in years and I'm keeping it that way come hell or high water.