Gemini will know that they have finally found THAT person when they find someone as rare as them. When he finds that person with whom they can be themselves without being concerned about what they think or think.
For Geminis, it is essential to feel comfortable in a relationship and feel that you are not pretending to please anyone. For Geminis, the most crucial thing in love is finding someone with whom you can be the person you want to be.
When you can finally bring out your funny side without fear, that's when you will know that you are the right person for Gemini.
You will no longer feel the need to hide your flaws or that which makes others look at you badly. You no longer have to hide who you are because they finally accept you for who you are.
Now Gemini can be as it is, with its flaws and its virtues. There are no more masks, and there are no more double faces. Now Gemini will feel in their skin. You will even be able to love yourself and raise your self-esteem little by little.
All these thanks to that person who accepts him and loves him. That person will allow you to be true to yourself, regardless of the circumstances.
When Gemini has found THAT person, they no longer measure their words for fear that they might hurt.
This is when Geminis become more talkative than average and when they want to share all kinds of stories with that person. His words change. His smile is better than before. Even now, it is much more positive than before.