Welcome @Kelly617! I'm somewhat new too only having hosted since December of 2017. I strongly encourage you to write another review (and ask the guest to do so as well). The fact that a guest has returned to your place often demonstrates to other potential visitors that your listing has characteristics which were attractive or important to someone.
Reviews are unbiased ads to others about your listing and help customers to decide to make a booking. I just had my first return guest and will have another next month. I guarantee you that I'm pushing them to leave reviews and am leaving comments for them on their profile.
The reviews also benefit the guest because they now have multiple comments from the same host, so future hosts know that the information is probably reliable and not a fluke.
Plus, more reviews will help you attain Superhost status AND you want more reviews (stars) on your listing because it reassures potential guests that you are experienced and reliable.
Reviews don't take much time to write and the benefits are worth the effort!