Do as you’ve already done for the past seven years, anonymous.
There is a lot to be said about routines, and in this case, they may be more important than ever. Going about your day as you usually do, complete with all the routines that you’ve always performed to maintain her mental health, will tell her that nothing has changed in the years she’s been with you, including how much you care for her.
While committing yourself to the same routine as always, consider adding a few more notes of affection to what you do. Set aside a day or time to give her more affection than usual. Give her a treat, groom her, or simply take her for a walk to someplace new. If she enjoys battling, consider strengthening your bond with her by entering a tournament or simply engaging in a few more battles than usual. If she doesn’t enjoy battling, allow her to help out about the house, comfort you when you are struggling, or generally take an integral role in your home life. Show her that she is still an important part of your life and that replacing her is far, far from your mind.
In short, the main thing to keep in mind is that she’s been important to you all along, so focus on doing all that you can to remind her that you have every intention of treating her with as much love as you had since you rescued her.