Friend, I used to be the biggest introvert ever up to the point I was either going to end my self or *****in deal with it. I chose the latter, still not sure whether existence is worth supporting...but that's another story for another day. I have come to the conclusion that the point of death is the ultimate equalizer and apex of clarity, thus I want to arrive there knowing as much as I possibly can to make sure I judge my life's worth, not the circumstances of my death doing it for me, if that makes sense.
Anyway I understand your situation, isolated, lack of resources and support, I can empathize. That being said, it is still not worth throwing it all away. True that being cut off from the familiarity of a support network makes difficulties much more daunting to overcome but I guarantee that once you do and look at the situation objectively you will find solutions you would have never thought would be possible.
Start one step at a time, the less you have to depend on people you can't trust the better and don't let those thoughts take over. You are the master of your ship.