Hi,You cannot change people's attitude.But you can change your behaviour and action.It seems you are a worrier and a people pleaser.There are certain skills you can learn through counseling sessions.You have to learn from mistakes.There are people who are trustworthy. You have distorted . belief called over generalization.
Next Steps
Consult a psychologist for CBT
Health Tips
Assertiveness
Communication skills
Accept yourself
Believe in yourself