How to make her wet?

When I put my tongue on her clitoris she says it's good, but when I insert my finger on her vagina she says it is uncomfortable, also same for my penis, we can't have our intercourse more than 5 minutes, she says it is very painful and sting, I tried over one hour with my tongue on her clitoris but still same, I have put some lubricant oils on my finger, penis and her vagina, but she says it is painful and sting, she said her vagina is dry, but sometimes when I put my tongue on her clitoris she says she feels something is coming from her vagina, but nothing had came PLEASE HELP ME, Now she says she can't marry me because of she cant give me the pleasure while we have an intercourse