Michonne and Rick aren't together in the comics. The focus of their characters and the overall plot doesn't bring them together romantically. However, their individual arcs are still significant and contribute to the depth of the story.
Michonne is indeed still alive. The story has continued to feature her and her adventures in the comic world. However, the situation could change depending on future developments in the comic storyline.
She might be overjoyed. After all, Naruto is her son. She could immediately rush to find him and embrace him tightly, tears of happiness streaming down her face.