He says he needs hot and erotism but I am only cute, should I stay?

So basically my very long term boyfriend says I'm attractive and cute but I'm not hot or sexy and that's what's lacking our whole relationship. The thing that gets me is that we've had 4 children together and our sex although pretty vanilla was nice but every time I brought up stuff to try he would avoid conversation. He's currently working through some stuff at the moment but this has come out, I have decided to stay and continue my role as a SAHM and support him keeping the relationship as friends for now, but is it even worth it? Should I just presume the relationship is over?

He says he needs hot and erotism but I am only cute, should I stay?
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