Here is a sample prayer for your partner in life that you can use as a guide:
Dear God,
I lift up my partner to you today. Please be with him/her and bless him/her in all that he/she does.
I pray that you would give him/her your strength and comfort as he/she faces the challenges in his/her life. Please give him/her wisdom and guidance as he/she makes decisions, and help him/her to know that he/she is never alone.
May he/she experience your love and grace in a deep and personal way. Please keep him/her safe and protect him/her always.
In your holy name I pray, Amen.