Is it a bad idea to transition into a real relationship from a friends w/ benefits?

At first, he told me he was too busy for a real relationship and we have been fwb for months but I told him that I wasnt going to do it anymore because i felt used. He said that it hurt him to hear that and when i asked him again why we werent dating, he asked me to be his girlfriend. But now, he doesnt want to hang out with me as much as I do because he "feels pressure". Should I just give him space to get used to this new situation or was this just a bad idea in the first place?