How Can Vaginal Dryness With Vaginismus Be Treated?

dear sir/ madam my age is 25 years and my husband age is 30 years. its already 9 months for our marriage but we are unable to have any sexual relation. Whenever my husband tries to intercrose, i unfortunatelly tighten my tighs and he tries tries but unable to insert in my vagina. as its 9 months i am fearing is there any defect in me or in him . It becoming big problem for me i belierve love trust my husband a lot and he loves me a lot but i am unable to give him the happiness. Please try to understand my problem and one more thing whenever we try my vagina is dry please help me hoping for your answer as early as possible