There are many quotes, from Mary Shelley's Frankenstein, which denote Victor's ignoring of both his health and social life.
All of the following quotes are taken from chapter five of the novel.
Coincidentally, Victor openly recognizes that he forgets to take care of himself and communicate with his family. In the beginning of the chapter, Victor states that he had been working such long hours that daylight would break while he was in the midst of his studies.
Soon [it] became so ardent and eager that the stars often disappeared in the light of morning whilst I was yet engaged in my laboratory.
At one point, Victor did have thoughts about returning to his friends and family. Unfortunately for both Victor and his family, he is, once again, far to consumed by his experiments and thoughts to return home or communicate with his family. While Victor admits to thinking about returning to his family, his experiments do not allow him to do so.
I thought of returning to my friends and my native town.
Later, Victor admits the toll his experiments had taken on his body and health. Not only had he worked himself to exhaustion, his body also paid the price for his endless work.
After days and nights of incredible labour and fatigue... My cheek had grown pale with study, and my person had become emaciated with confinement.
Still on his mind, during his recollection of his tale, Victor realizes that he had forgotten his friends and family given his obsession with reanimating life.
And the same feelings which made me neglect the scenes around me caused me also to forget those friends who were so many miles absent, and whom I had not seen for so long a time.
Over the course of the novel, Victor becomes ill many, many times. His success has forced a being which will hurl Victor into sickness after sickness (typically brought on by the creature's murder of Victor's brother, William, and his best friend, Clerval). Essentially, Victor's obsession with both science and reanimating life forces him to never be the same; he is ridden with weakness and illness from the initial moments he began his experiment.