He said he thinks I am getting serious.?

I went out with this guy about 3 months ago on one date but nothing really came out of it. We hung out a couple of times after that with some other friends and it wasn't clear what he thought. About 2 weeks back, we went for dinner (just the two of us) and I asked him to explain his behavior. Then he said he liked me and we decided to be "more than friends" and see how it goes. I told him that I am ok with not giving it a name but that it has to be exclusive.

Yesterday he asked me where it was going (I am very straight forward and had told him earlier that I am perfectly fine with not having this discussion and just enjoying each other's company). He said that he thought I was getting serious and may be thinking of long term and he wasn't ready for that. He said that when I kissed him, he felt there was "something more" to it. I was taken aback because I wasn't thinking of anything long term at all and was just living in the moment. After I made myself clear, he apologized a lot and kept saying that he wants to keep seeing me and that he hoped I would not end it because of his stupid misunderstanding.

I am now too confused about it and don't know what I should do to not give him any ideas that aren't even in my head.