Dan Curtis' "Dracula"(1973 Television movie)?
This made for TV version of Dracula was directed by Dan Curtis, the man who brought us Dark Shadows, and as M.A. Golding pointed out in his answer, I think the romantic sub plot was brought over by Curtis and he may have talked Richard Matheson, the author of the teleplay, into including it in his story. The difference in this version is that the Count sees his lost love in Lucy instead of Mina.Here is a paragraph from one of the user reviews on IMDb.
"Other fans of DARK SHADOWS will recognize the lost-love element as having come from Barnabas Collins' tragic situation in that series. It adds a magnificent new element to the Dracula story without diluting the original. Bob Cobert's music, also familiar to DARK SHADOWS fans, is the perfect accompaniment to the tale of the vampire count. I have watched this numerous times since it became available on tape."
Here is the TV trailer from YouTube which includes clips of scenes in which Dracula was remembering his lost love.
The idea of a reincarnated lost love was not present in the original novel "Count Dracula", but I think this was the earliest movie version to include it.