I am sorry for your loss.
There is no replacment for your lost spouse. But Your heart& mind could acomodate love for other peopel as well. Feel great, happy & lucky that you had the oportunity to experience & live that love with your spouse. many people never experience that ever in their lives.
Try to keep yourself busy with constructive activities. Time will heel, but with the power of your mind, you may be able tol make that required heeling time as short as possible.
Healthy diet & lifestyle would help you cope better as well.