Cancer will know that they have finally found THAT person because they will feel appreciated by them. You will feel that everything you give, you are rewarded for everything you receive. That now there is finally a person who gives himself the same as Cancer and who does not have to worry about it. You will finally feel that your efforts are being recognized and appreciated as they deserve. You no longer feel that you are giving yourself more than you should because you will always find the other person willing to give you a hand and thank you for everything you do for them. Cancer now no longer worries about being taken advantage of; now, it worries about enjoying the minutes and hours next to that person that it loves so much.
It is easy to know that Cancer has found THAT person ... It changes his face, smile, and way he sees the world. I could even become a bit more reserved and want to protect everything that he has at all costs.
You will no longer be spending all of your time and energy to make the relationship work. Now that effort is divided by two, and not all the burden will fall on Cancer. But when you find the ideal person, it will not take any effort as the relationship will work naturally, on its own, which will make Cancer happy. When Cancer finds that person, he realizes that all the waiting has been worth it. Now, he has finally found someone who can understand his mood swings, his more sensitive side, and his comings and goings. Now Cancer finally feels more understood than ever.