Being single is a state of life which some discern to be for them, it is a life whereby they express their gifts, experience a rich life and find their place in the family of the church.
Being single is a call to something positive. God calls you to a way to encounter Him in the circumstances of your state in life. There is a sense of peace and freedom to develop and explore life as a single person. This vocation leaves one free to undertake work or charity that others may not be able to do because of the constraints of other commitments.
St Francis de Sales said "Do not wish to be anything but what you are and try to be that perfectly." In whatever vocation we’re called to we need to respond to and do God’s will with a joyful heart.
“We must also remember the great number of single persons who, because of the particular circumstances in which they have to live - often not of their choosing - are especially close to Jesus’ heart and therefore deserve the special affection and active solicitude of the Church, especially of pastors. Many remain without a human family often due to conditions of poverty. Some live their situation in the spirit of the Beatitudes, serving God and neighbour in exemplary fashion. The doors of homes, the ‘domestic churches,’ and of the great family which is the Church must be open to all of them. ‘No one is without a family in this world: the Church is a home and family for everyone, especially those who ‘labour and are heavy laden.” (The Catechism of the Catholic Church, 1658) - The Mission of My Life by John Henry Cardinal Newman
God has created me to do Him some definite service. He has committed some work to me which He has not committed to another. I have my mission. I may never know it in this life, but I shall be told it in the next. I am a link in a chain, a bond of connection between persons. He has not created me for naught. I shall do good; I shall do His work. I shall be an angel of peace, a preacher of truth in my own place, while not intending it if I do but keep His commandments.
Therefore, I will trust Him, whatever I am, I can never be thrown away. If I am in sickness, my sickness may serve Him, in perplexity, my perplexity may serve Him. If I am in sorrow, my sorrow may serve Him. He does nothing in vain. He knows what He is about. He may take away my friends. He may throw me among strangers. He may make me feel desolate, make my spirits sink, hide my future from me. Still, He knows what He is about.