Stressing☹️

Ok so there’s this guy, and we’re pretty close. We’ve been talking for about 9-10 months. Well, we admitted to having feelings for each other recently, but we decided not to date until we hang out/get to know each other more. He’s a really nice, and respectful guy and I really like him, but these last couple of days he’s been acting kind of distant and upset with me and I don’t know what’s wrong. I keep thinking I said something wrong but he says it’s nothing🤷‍♀️ I told him that I’m only asking because I care about him and he just said “don’t”. I’m kinda confused. I want to be there for him, but at the same time I want to leave him alone. What should I do??