It's natural for the initial excitement and passion in a relationship to fade over time, and it's important to work on maintaining a strong and healthy relationship to prevent your girlfriend from losing interest in you. Here are a few tips that may help:
Communicate openly and honestly with each other about your feelings and needs.
Make an effort to spend quality time together and do activities that you both enjoy.
Show your appreciation for your girlfriend and let her know why you value her.
Be supportive of her goals and aspirations, and encourage her to pursue her interests and passions.
Be willing to compromise and make sacrifices for the sake of the relationship.
Be honest and trustworthy, and make sure she knows that she can count on you.
Remember that a healthy relationship is a two-way street, and it's important to make sure that both partners are happy and fulfilled. If your girlfriend is losing interest in you, it may be helpful to talk to her about it and try to address any issues or concerns she may have.