My boyfriend but not really my boyfriend.

So my ex and I have gotten closer over the year and might get back together. So when we go out, we stay in my car and talk about things going on the world ( that’s how we bond). So he asked me “ let’s say you’re married and you get into a accident, the doctor said you can’t have vaginal sex, how would you keep your husband?”. At first I thought about what to say and he later said “ anal and blowjobs, right?” Instantly, I got upset. I told him “ no, it’s not only that, you have to have a connection with the person that you’re with” and he responds “ so how would you keep your husband?” And I said “ it’s not only about sex. You’re with someone because you love them, want to do new experiences with them, get to know them more.” After that we stayed quite the ride back. He noticed my response was sincere and hold my hand. But deep down my heart I feel like he’s not ready to take the next step. So I don’t know what to do.