idk random

I'm in a abusive relationship but I have deep feelings for my best friend and he's very honest with me bout stuff but the other day I came over and he had hickies all over his neck it makes me so mad bc the girl he had sex with he told me that their were only smoking then days before he was at my house and I asked him who all you been having sex with and he told my nobody. Do I even have the right to be mad at him ?