Master Samael never said that being single is a problem. He said that celibacy, sexual abstinence without transmutation, is destructive.
As for pranayama, the methods are effective and work. If you are not successful with the methods, you must analyze and re-evaluate your application of them, because the practices are not at fault for your suffering.
If anyone fails to progress in this path, it is because of the mind. Even if one gets married in a dejected, despairing, and morbid state of mind, then a matrimony will make that doubly worse, because "it is always a great responsibility to be two" according to Friedrich Nietzsche.
Being married implies more work, and if you are struggling to work on yourself individually, it will be twice as challenging when working in sexual cooperation and marital union.
Aquarius is the house of confraternity, friendship, and social interaction. In this Aquarian era, we must learn to be more useful to our fellow man, to be social, and to work in the silence and privacy of our homes through psychoanalytical meditation as we gather observational material about ourselves through our interactions with our friends, neighbors, family, strangers, etc.
You find your alchemical partner based on your psychological works. When you show maturity in yourself, working to comprehend and annihilate what must be comprehended and annihilated, then you will receive understanding. With understanding, you will know who your partner is based on the growth, blossoming, and development of your soul.
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For thirty years I sought God. But when I looked carefully I found that in reality God was the seeker and I the sought. -Bayazid al-Bastami