How does Victor demonstrate obsession?

When Victor is about to bring the creature to life, we can see his thought process immediately leading up to that moment.
He is very excited about his work, and is literally obsessed by it. Yet, he is isolating himself more and more and even recognizes the "wreck" he has become. He notes his "silence" more than once in regards to his family and friends and describes the "neglect" he has shown his relationships and even his own health. In other words, he has become so obsessed with this project that he has shut everything else out of his life. His relationships are suffering, as are his mental and physical well being.
All of this is important in helping us to realize two things: he has no one else around telling him that this project might not be a good idea AND we must question his sanity and stability given the way he is describing himself.
https://www.owleyes.org/text/frankenstein/read/chapter-iv