Forgotten Title

The setting of the story is medieval fantasy times where there’s wizards and it mainly takes place in a wizarding school. The fmc is reborn after her significant other dies mysteriously and this time in this life she must save but he’s acting really different and she realized in her first life, he’s the one that approached her. I found this out through the comments but apparently it’s a cycle, her “first” life is apparently the ml trying to save mc but he dies and she tries to do what he does and then dies