Sexually Frustrated

I am sexually frusterated because I do not easily get turned on. 😥 To be honest, I don't know how, and I don't know how to tell if I'm arroused or not. (Besides checking myself if I feel wet) That rarely happens. I just feel very confused sexually. I never masturbate because it doesn't feel like anything. I'm worried I am starting to frusterate my partner, and/or be hurting his self esteem because he can't turn me on.Â