If you are being used then someone is taking advantage of you and benefiting from this dishonesty in some way. It may be a relative who takes advantage of your compassion to have you do things for them, or a friend who only hangs out with you because you pay for everything all the time. Being used is not acceptable, and if you find out that someone is using you then the situation needs to be addressed immediately.
When a toxic person can no longer control you, they will try to control how others see you. The misinformation will feel unfair, but stay above it, trusting that other people will eventually see the truth just like you did.