St. Thomas discusses a spiritual Communion, where we are unable to receive the Eucharist, but through a true desire for union with Christ, we can receive spiritually. Ideally, we would go to Mass every day and receive the Blessed Sacrament every day, but for most, that is not possible. Instead, we can desire and seek a spiritual communion each day. Pray for union with Jesus, desiring His body, blood, soul and divinity and your prayer will be answered. This is a good prayer for spiritual Communion.

Source:  St. Thomas Aquinas, Summa Theologica