Therapy. There is no magic pill to have better sex. After excluding any physical problems, there are many excellent therapists that specialize in sexuality. Many people need to explore their emotions and religious beliefs. You gain insight into your personal conflicts that block your enjoyment of your sexual feelings.
More info needed. lots of things can reduce sex drive: history of trauma/abuse, medicine, hormones, mental illness, physical illness. need more info to give a more detailed opinion. lots of people have some degree of sexual dysfunction and its a common discussion to have with your primary care physician. also there's many many sex education websites that can provide more detailed info.