Did I go overboard

Hey ladies I work overnights and I just found out that my boyfriend bought a girl home and she spend the night. He’s been seeing her and she’s been coming to my house but she never came inside. Last week he had an hickie and he’s always on the phone with her as soon as I walk by him. He’s quiet and he’s been sleeping with both of us he finish stepping with me in the morning and go sleep with her at night. I went crazy I called him and he saying oh it was late. He’s all calm like it’s normal to bring some girl he’s been hanging out with so I went and put bleach all over his clothes and shoes