The Moon is not actually leaving us, but it appears to be moving away from the Earth due to a process known as lunar recession.
This is caused by the gravitational interaction between the Moon and the Earth, which results in the transfer of energy and angular momentum between the two bodies.
Over time, the Moon's orbit gradually increases in size, causing it to move away from the Earth. This process has been ongoing for billions of years and is caused by the gradual loss of energy from the Earth-Moon system. The Moon is estimated to be moving away from the Earth at a rate of about 1.5 inches per year, which is a very slow process and not noticeable over human timescales.
It's important to note that the Moon will not eventually leave the Earth's orbit and wander off into space. Instead, the process of lunar recession will continue until a stable equilibrium is reached, where the gravitational pull from the Earth balances out the centrifugal force from the Moon's orbit.
In conclusion, the Moon is not leaving us, but it is slowly moving away from the Earth due to the process of lunar recession. This is a natural process that has been occurring for billions of years and will continue until a stable equilibrium is reached.