sick and tired of this day to day BS

Any more i feel like my only purpose in life is to be used by people who don’t thank the people that help them to the best of their abilities but instead walk off with taking a second look like it was nothing and they just wanted the free ride…. I’m to the point to where if anybody comes up to me and asks me for something and i don’t catch any sincerity from them i’ll tell them to f**k off and walk away… I don’t know how much more i can take of it and I’m to the point where i want to end it so i won’t have to deal with it anymore