Should my boyfriend let his friend sleep round?

i wouldnt stand for it either. maybe im insecure but there is no way i would be happy if my boyfriend had another gay guy ( were gay) staying at his house so i know how you feel. why cant she stay in a hotel or find other friends. it just doesnt seem right to me. maybe your boyfriend is being honest and has no intentions of anything happening with her but she sounds like she is up to something