okay that fell flat. The link takes you somewhere irrelavent. Here's what the Sexual Health team says about the question posed (not by me originally):
If I interpret your question correctly, you are saying that when your boyfriend/fiance touches you or says anything emotional to you your vagina gets wet.
This is actually what is supposed to happen when you are aroused sexually. In a male when he is aroused, blood flows into the penis and he gets an erection. In a female, blood flows to the walls of the vagina and to the other external genital parts such as the labia (lips) and clitoris causing them to swell and to moisten with wetness.
Sexual arousal may be created by touching or talking or even seeing things that excite us, AND we may not always be able to control that it happens. Our body is just responding. In your case, you don't want it to respond but it is.
There really isn't any medicine that you can use for it. It is a natural process of the body and it really can't be stopped. You could ask your fiance not to touch you or talk with you but both of you would probably not like that either.
I hope you will get used to your body responding and enjoy it. If I didn't answer the question you were asking I hope you will write back and tell me what it is that you want to know. Thank you for writing.