Yes, the sexual energy can be depleted through abuse of that energy. However, the apparent lack of sexual interest does not mean that energy is depleted. Such lack of interest can also indicate a psychological obstacle to the sexual function, such as anger, fear, pride, vanity, emotional or spiritual trauma, etc.
“Nothing is easier than self-deceit. For what each man wishes, that he also believes.” —Demosthenes
"Do not worry; cultivate the habit of being happy." —Samael Aun Weor