My Jesus, 
I believe that You are present in the Most Holy Sacrament. 
I love You above all things, 
and I desire to receive You into my soul. 
Since I cannot at this moment receive You sacramentally, 
come at least spiritually into my heart. 
I embrace You as if You were already there 
and unite myself wholly to You. 
Never permit me to be separated from You.

Amen.

https://www.ourcatholicprayers.com/spiritual-communion.html

https://en.wikipedia.org/wiki/Spiritual_Communion

https://www.vaticannews.va/en/prayers/the-spiritual-communion.html