It always takes two to tango and you're right to not bitch about them but then saying you were stabbed in the back is silly. Being a founder is tough, having co-founder problems is tougher, clearly understanding what your part in the dynamic is or was is even more difficult.
Sometimes, too, to get this level of internal depth takes distance from the people and the experience. It took about six to eight months for me to figure out what was rightfully my fault and what was rightfully my co-founder's fault - beyond "seeing the warning signs early".
Also, I don't know what your captable looked like but if you were the controlling interest you cannot and should not expect anyone to care about what position you're left in - you must be prepared to shoulder the burden on your own for a bit if they decide it isn't worth their time anymore. The more you own it the more you own it.
Hope you're okay and sorry if this comes off as admonishment, it actually comes from a heartfelt place. You're welcome to contact me personally if you want more support.
[EDIT]
Re-reading my comment, I might be coming off too much as an armchair psychologist, I'll leave the comment up for posterity and maybe you'll find something useful in it or not. Either way I think you've handled yourself well and hope that you yourself are doing well.