From what I remember, this was one of those “B” style movies from the 1990s.  In this movie, it was a woman who was I believe a hit woman hired to kill this guy.  The guy had black hair and he was like a computer geek I believe.  he had a microchip or cds or something and anyway somehow convinces the girl to help him by I think paying her.  She falls for him and at somepoint, she takes him to his mother’s house so they can hide out for a bit and she pretends to be his fiancé.  I believe they were driving around in a convertible.  The girl was a short long brunette I believe, kinda looks similar to a cross between mouse in the kickboxer movies and Claudia Coghlan from Arena.