Guys, would your feelings change or stay the same after having a friends with benefits for so many years?

So long story short. Is it possible that a man can SEX around with a woman for years and not be interested in her. Or do things change emotionally. So my reasons to why I'm asking is because my friends with benefits of 8 years confessed to me a few months ago so he was physically attracted to me. But my thing is could he also have developed some feelings in between. He seems very content with asking me about sex, but also if I really gave this man the benefit to have me like he wishes sexually. How long will this man keep me around, but I'm just curious to see if he feels anything for me. I mean we have been sex in 4 years and I'm thrilled and very pleased with him coming out and telling me how he feels towards me. I mean he never did say he wasn't or didn't not like me. And the only time that he told me that he liked me was early on back in 2014 when we first got acquaintance and met. But currently we're not sexting each other anymore I chose not to my body is not for him to play on a my feelings is not to be played with. He has holes and I have respect and boundaries. But anyways how would you guys feel after sexing someone for so long does feelings change or stay the same. Or how long. would you keep that person around and why would you keep that person around?
Guys, would your feelings change or stay the same after having a friends with benefits for so many years?
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