Dream of eyes, biting, caught

I’m in a forest with a girl it seems as she is wearing old black clothes as time passes I see she has blue pupils with cat slit eyes and fangs she actually ends up biting me in the neck at that time she had a twisted smile but as time passes before I wake up I see the worst sadness on her eyes through the dream I felt a heavy feeling. After I wake up the pain were she bit me lasted almost 2 days with no marks on my body. The thing that caught my attention was her sadness and well my neck hurt after the dream as it really got punctured by something sharp. I never seen the girl ever again at that time in my dream it felt nostalgic to see her like I knew who she was but I could not remember maybe that’s why her sadness bothered me even do that twisted smile had and intent to kill that’s what I felt till the sadness part in my dream after that it ends.