I read this book in HS and loved it.
The basic summary of the book is a group of friends get together at a house near a lake. Underneath the lake is a lost city that houses vampires. There is some romance too.
I've tired every avenue I can think of, so any help is much appreciated.
Oh, I read the book in the early 90's. Thanks!

Do you remember any of the charater's names?

Do you remember any of the character's names?

No, sorry, I don't remember any of the characters names. However, I do remember a little more of the plot. They are a group of friends who are searching for a lost treasure in the city under the lake. Hope this helps, I really would like to read this book again.

It sounds like it might be Dawn of the Vampire by William Hill.
http://www.fantasticfiction.co.uk/h/william-d-hill/dawn-of-vampire.htm