Any meaning that you or I find in life is unique and meaningful only to you or I. Whatever meaning I gleam from something is something I’ve attributed to it, not something in it that I’ve discovered. Any good thing that I do and that other people find meaningful is something that is meaningful because it touched other people in an apparently beneficial way rather than it being some deed of cosmic significance.
This doesn’t sound like nihilism to me. This may seem like an odd question, but your wording prompts it. Were you by chance raised in a religious household?