Brahmacharya fails only when ethics are compromised. Otherwise, as a single, you can reach great realizations, eliminate a lot of defects, and perform great sacrifices for others, thus paying debts and acquiring cosmic capital. The only part of the work one cannot do alone is create the solar bodies.
To adequately transform the energy, you probably need a variety of tools in combination: pranayama, physical exercise, runes, meditation, etc. Most of all, one needs meditation. Daily meditation utilizes the sexual energy quite directly.
“Nothing is easier than self-deceit. For what each man wishes, that he also believes.” —Demosthenes
"Do not worry; cultivate the habit of being happy." —Samael Aun Weor