1. They tell blatant lies.
2. They deny they ever said anything, even if you have proof.
3. They use what is near and dear to you as ammunition.
4. They wear you down over time.
5. Their actions do not match their words.
6. They throw in positive reinforcement to confuse you.
7. They know confusion weakens people.
8. They project.
9. They try to align people against you.
10. They tell you or others that you are crazy.
11. They tell you everyone else is a liar.

- taken from, "11 Signs of Gaslighting in a Relationship" from PsychologyToday (https://www.psychologytoday.com/blog/here-there-and-everywhere/201701/11-signs-gaslighting-in-relationship)

It takes a while but eventually the pain recedes. It becomes acrid first, then bitter, then bittersweet, and finally it will taste like nothing at all.