1960's, The boys mom keeps telling him to marry a woman like her so he kills the girls one by one and uses the body parts that look like his mom's, One girls hands, One girls legs, Etc.
The boy helps them escape but kills them when they do.
He assembles the "Bride" together in the attic and when he is done assembling his new bride he introduces his mom to her in the attic and locks her in the attic and says "Get to know her she is just like you".
This is a old movie, 1960's, May have been b/w and looked like a Hammer film.
The girls school was a castle looking building.
The mom would tell her son none of the girls where good enough for him, "Find a girl like me" seems to come to mind.
"Get to know her she is just like you".
It's not a Dracula movie and the girl he put together is dead on a table when he leaves his mom with her and say's "Get to know her she is just like you" or something like that as he locks his mom with her in the attic.