Tell me if I’m overreacting.

So my boyfriend has dreads and he usually wears my hair ties to keep his hair up since his dreads are so long so yesterday I see he had a purple hair tie in his hair I said where you get this from and he’s like from your bin(I keep all my hair ties in it) I said no I only own black ones I never brought colorful hair ties. And as childish as this is he’s known to lie and be sneaky and we’re currently in the process of trying fix our relationship from his bs. So I always have my guard up. I did speak my mind and tell him I never brought any purple hair ties I go in and out that bin daily and never once came across that. He still claims it was mine and now saying he won’t ever you nothing of mines again since I don’t know what I have in my bin. He’s mad at me now but this is what he do but the whole time he’s lying.