You mentioned questioning your calling to celibacy. Maybe you’ve read the Catechism on this already, but in case you haven’t I’d like to mention the section on chastity: vatican.va/archive/ccc_css/archive/catechism/p3s2c2a6.htm
Note the emphasis it gives to ALL baptized Christians being called to chastity.
2339 Chastity includes an apprenticeship in self-mastery which is a training in human freedom. The alternative is clear: **either man governs his passions and finds peace, or he lets himself be dominated by them and becomes unhappy.**126 "Man’s dignity therefore requires him to act out of conscious and free choice, as moved and drawn in a personal way from within, and not by blind impulses in himself or by mere external constraint. Man gains such dignity when, ridding himself of all slavery to the passions, he presses forward to his goal by freely choosing what is good and, by his diligence and skill, effectively secures for himself the means suited to this end."127
2340 Whoever wants to remain faithful to his baptismal promises and resist temptations will want to adopt the means for doing so: self-knowledge, practice of an ascesis adapted to the situations that confront him, obedience to God’s commandments, exercise of the moral virtues, and fidelity to prayer. "Indeed it is through chastity that we are gathered together and led back to the unity from which we were fragmented into multiplicity."128
2341 The virtue of chastity comes under the cardinal virtue of temperance, which seeks to permeate the passions and appetites of the senses with reason.
2342 Self-mastery is a long and exacting work. One can never consider it acquired once and for all. It presupposes renewed effort at all stages of life.129 The effort required can be more intense in certain periods, such as when the personality is being formed during childhood and adolescence.
2343 Chastity has laws of growth which progress through stages marked by imperfection and too often by sin. "Man . . . day by day builds himself up through his many free decisions; and so he knows, loves, and accomplishes moral good by stages of growth."130
2344 Chastity represents an eminently personal task; it also involves a cultural effort, for there is "an interdependence between personal betterment and the improvement of society."131 Chastity presupposes respect for the rights of the person, in particular the right to receive information and an education that respect the moral and spiritual dimensions of human life.
2345 Chastity is a moral virtue. It is also a gift from God, a grace, a fruit of spiritual effort.132 The Holy Spirit enables one whom the water of Baptism has regenerated to imitate the purity of Christ.133
It might be more helpful to you to think upon these lines. Many married people, though they indeed have companionship, still struggle with chastity all their lives. Though marriage indeed can be chosen by those who “burn with passion” as St. Paul says, the virtue of chastity is not ultimately going to be gained by anyone through the mere presence of a lawful “release” or “outlet”. It is gained by self-mastery, by the grace of God, by prayer. I am a single, non-SSA man who has never had the companionship of a woman, and I don’t know if I ever shall. I, too, am called to chastity. I have not found any peace when I have given into my passions.
Someone recommended the “Courage” apostolate - I hope one is near you. May God be with you. And please, bring this to a priest! Arrange an appointment for a longer confession if you must! He has the training and grace of state to help you much better than we on Catholic Answers Forums can.
Finally, you’ve probably heard of this already if you’re discerning with the Dominicans, but please consider enrolling in the Angelic Warfare Confraternity, which is one of their apostolates. It’s specifically oriented towards developing chastity and fighting impurity. angelicwarfareconfraternity.org/