This may seem like a flippant answer, but accepting it actually makes the pain go away.

For everything that goes wrong for you in this life, in a mirrored reality it's going right instead. Every time your heart is broken here, it is filled with happiness there. Every lonely night here means another (part of) you is partaking in wonderful love-filled bliss. Every negative experience here is equally matched with a positive experience in a mirrored reality.

The trick is learning how to switch places.