Why do I have little faith in people?

I always acted in good faith and i think as a young lady i put so much faith on people especially those who aren’t worth it but the thing is, as time passed, i lost my faith in them and just ended up avoiding making close relationships. What should i do to get out of the mindset that people aren’t worth trusting? Even though i know there are still some who i might trust, i want to run away as soon as possible when it comes to forming long term relationships. Anyone who has been through the same situation?

Why do I have little faith in people?
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