We all miss someone. Mexican culture has a wonderful holiday centered on remembering and honoring the dead. Here is a brief primer via Wikipedia if you are unfamiliar with the tradition:
The Day of the Dead celebrations in Mexico developed from ancient traditions among its pre-Columbian cultures. Rituals celebrating the deaths of ancestors had been observed by these civilizations perhaps for as long as 2,500–3,000 years. The festival that developed into the modern Day of the Dead fell in the ninth month of the Aztec calendar, about the beginning of August, and was celebrated for an entire month.