For someone who doesn't believe there's a God, that's quite a religious thing to say. The Old Testament: "Rejoice and be happy (sing, dance, drink wine and party) for this is the day the Lord has given you" (That probably isn't the exact wording but is close and conveys the same message).

But you're right in believing that your human existence has little or no meaning, is nothing more than illusion. Because that's just what it is, illusion.