* It's passive: The sentence implies that someone else is looking forward to the indulgence, but it doesn't specify who.
* It's vague: "Indulging yourself" could mean anything.
Here are some ways to improve the sentence:
* Add a subject: "I look forward to indulging myself."
* Add context: "After a long week, I look forward to indulging myself with a relaxing bath."
* Make it a question: "Do you look forward to indulging yourself?"
Ultimately, the sentence's meaning depends on the context and the intended audience.