Act of Spiritual Communion:
You can make an act of Spiritual Communion by saying one the following prayers:

​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.
Or
I wish, my Lord, to receive You with the purity, humility and devotion with which your Most Holy Mother received You, with the spirit and fervour of the saints. Come Lord Jesus. Give me, good Lord, a longing to be with You, give me warmth, delight and quickness in thinking upon You. And give me Your grace to long for Your holy sacraments, and specially to rejoice in the presence of Your very blessed Body, Sweet Saviour Christ, in the Holy Sacrament of the altar.  Amen.   (From St. Thomas More)