We might refuse to acknowledge that it happened, but yes, Andrew dies after getting stabbed. While Meredith is still in a coma, she does see him in her dream-like state at the beach. Meredith admits to him that she'll miss him if she comes back and he doesn't. Andrew, being the reassuring ex that he is, reassures her that it'll be OK. He tells her that he has to go, and runs along the shoreline towards his mother. Was it the ideal ending? No, but it's as beautiful an ending as you'll get with a Grey's Anatomy death
.