<human>: Can you succinctly summarize the text in 1-3 sentences?

I have been trying to get my boyfriend, Chad, of a year to rid himself (or go controlled/ partial contact) with his extremely toxic friend. 

They have been friends since before age 8. However as an adult, his friend Julian, is an utter ass hole. He is controlling, he physically and emotionally abuses his girlfriend, emotionally abuses others, is petty, selfish, narcissistic. The list of all of his poor attributes would take forever to write out. 

I have verbally confirmed that I think he is a terrible human being and I asked my boyfriend to at least go controlled contact with him. Chad acknowledged that Julian is doing all of these things and more that I didn't even know about. Yet he still refuses to cut the Julian cancer out of his life. 

I absolutely adore and love Chad. But I don't want Julian in our lives. Is there any way that I can talk to him to help him make a decision? I just don't understand how he can keep someone like that in his daily life.
<bot>: have been trying to get my boyfriend to dump his toxic friend from his life and just ignores my concerns/ doesnt make a decision. What should I do?