Really, really bad timing on his part. Enough to cause me to raise an eyebrow. But, on the whole, I would go with one of the wordings already proposed.
Yeah, I agree about the bad timing! He was a bit presumptuous I think.
You know, I'm not so sure about that. Maybe if OP and her date were in their early 20's, it'd be an odd and inappropriate question, but I get the impression that they're older. It's a natural curiosity - why haven't you found a partner by this point in your life? I'd want to know, personally. To find if they are indeed just particular and cautious, which is a good thing in my mind, or if there's some deeper issue that might give me a clue as to whether THIS relationship
was going to go anywhere or get weird.
Example from my own life: my brother is 39. He's never, and I mean NEVER had a long-term, serious, intimate relationship
with anyone. So many people are friends with him, he loves to socialize and he's the life of every party (in a good way, not a crazy way). But he's terrified of getting close to someone, terrified of getting hurt or rejected, and he will never open up to anyone, not even his siblings. I have my suspicions as to the ultimate reason for this, but I've always respected his personal privacy regardless of my concerns for him and I don't want to pry into things he's probably not able to deal with in a healthy manner. Blame our parents for a lot of that, but the guy IS an adult and still can't summon up the spine to take a chance. He's a great date, easy to talk to, attractive, friendly, but you'll run up against his wall pretty quickly and you're not getting through it. This is frustrating for anyone, especially someone who wants to get close to him.
This is the sort of thing any date needs to know, and the older you get the quicker you want to get to the important stuff, the things that will be the deal-breakers, because as you get older you don't want to waste your time. And you're just interested in the person - in more than just their taste in movies or their favourite foods. You want to know what makes them tick, what it might take to make them truly happy, all that good stuff.
This is my opinion based on observation and experience. YMMV.