Advice! Don't know what to do

Advice please…me and my boyfriend moved into his house that he owns after his ex wife and their kids moved out and to Louisiana…she left pictures of him and her and their kids on the wall…left all kinds of other small things too…he hasn’t taken them down and even a good friend of his told him he should because its unfair to me to see that every day when me and my kids live here too…what should I do…