The Spiritual healing, as said, lies in the 2nd chakra mostly and in Mars energies. You may have a weak Mars in your Natal Chart causing you to feel a low sex drive, this may be simply you - you may have a natural low sex drive. I would first of all check my Natal Chart to determine if this natural for you, or is due to external influences, so you know where to work. If you have a strong Mars and Aries in your Natal Chart, the problem is somewhere else.
There are several reasons why 2nd Chakra is weak, that are : chakra damage/blockage (from past lives, hangups, childhood trauma, abuse), Natal Chart weak Mars energies, excess clash with other people energies (to obtain power, domain in the material world), other people's Planets weakening your Mars (such as their Neptune or Saturn in hard aspect), damage in other areas of the Soul leading to loss of male energies (Mars is male energies).
I'd also say, many women have this problem, at least in xian countries. I wonder in islamic countries even worst. It often happens women have few interest in sex because they are PROGRAMMED by their parents, mainstream information, etc. to believe sex is bad and all men are evil because they want to have sex with women like pigs. This is the mainstream teaching many daughters receive, to "be aware and pay attention to the evil men" so - at the end - the mind is programmed to avoid sex or loose interest in this. Whatever happened to your mind in childhood (mother depicting men/father as evil, subliminal stuff, abuse, instilled fear, etc) may drive your unconscious for the whole life, if not corrected.
The enemy has a hiuge interest in repressing sexuality, xian program is built on this. They even teach to have sex only to procreate and never before marriage! Those teachings are very outdated but may be installed in your subconscious, preventing a healthy sex life.
I say all of this because finding the root problem will help to put down the correct affirmations for your Mars workings, or even Munka freeing meditation to free from blockages preventing sex drive to manifest. Don't blame yourself, it is not your fault; I would just dig to find the causes.