Usually those that invest in people are the most disappointed when those people show their true colors. I have examples of that in my own life.
So sorry this happened to you too. Did this happen in your situation? Although I realise that it is true, it is a sad realisation and it makes you feel discouraged from trusting people.
AnnKay, it wasn't necessarily me as much as it was witnessing other people invest in others, and then be severely disappointed. I have a relative that had a very troubled H. I saw his true colors very early on, but others did not and got burned by loaning him money or getting him jobs (which he would eventually flake out on and stop showing up).
As far as trusting people, I am one of those that prescribes to trust being something that is earned. I do not bestow trust on others blindly, or without seeing if I can trust them. Unfortunately, most people are not trustworthy. And trusting people too quickly, or without seeing if they are trustworthy, is a recipe for getting burned.
When I worked in retail years (decades) ago, we were taught a simple truth: 15% of people will never steal no matter what. 15% of people will always steal, no matter what. 70% of people will steal if given the right opportunity to do so, and if they think they can get away with it.
This goes to show that 85% of people are basically untrustworthy. The numbers can be argued, but the principle cannot be. The fact is that unfortunately we live in a world where you cannot trust MOST people. I can count on one hand the number of people I've met in life that I can truly trust.