I am sorry to hear about the loss of your wife. She is with God now and he will take much better care of her than anyone on earth would have been able to.

Realize that she is at peace, and it was better for God to take her than it was for her to keep suffering here on earth. While she is no longer with you physically, she is still with you spiritually and emotionally, therefore you did not necessarily "lose" her. She will always be in your heart from now until the day you meet her in heaven. Cherish the memories you have of her and remember her while she was healthier and not suffering. As I said you will meet again, and know that she is always with you, never lost or forgotten.