Found this on my (20F) partner’s (20M) pillow

I found this on the pillow of my bf of 6 months, and I am kind of worried. It looks like it could be a clump of fibers but I do not see anywhere in his apartment it could have come from. Both of us have black hair and have never bleached it. He is one black cat that stays inside. I don’t want to seem like I’m crazy, but I can’t think of anywhere this would’ve come from myself if it is hair. It does look like it could be some kind of fiber, and it feels different than typical healthy hair, however it also looks like it could be bleached thus the look of it and texture.

TLDR: found hair that does not belong to me on partner’s pillow, seeking advice.