My boyfriend brings his creepy friend over what can I do?

So my boyfriend has a guy friend & he didn’t really do anything that I can point my finger at and tell my boyfriend. He gives creepy vibes & i am really good at telling who is a creep he basically “eye fucks” me. I constantly notice him starring at my body. I wear only conservative clothes around him cause his eyes violate me. When i notice him starring i show him that i know i look him dead in the eyes and cover myself with a disgusted look on my face. Anyway I don’t feel safe when he is around but my boyfriend insists he is a good friend of his & even allows him to sleep over which is a big problem. Even when my boyfriend is not in the house he would show up & claim he forgot something which stresses me a lot. I feel like he didn’t do anything which i can share with my boyfriend so I don't know what to do 😩
My boyfriend brings his creepy friend over what can I do?
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