I messed up

I'm really not sure what the appropriate topic is. But I am in a long distance relationship with my boyfriend. We met for the first time early this year. Everything was going great, intimacy was great. A few weeks ago, we were having a nsfw conversation,  just silly talk, and he asked me questions on how someone could even do something (perverted), but I think he mightve asked rhetorically,  but I answered him literally. I stupidly brought up an instance in my past where I witnessed a man do the act. This man touched me as a child, so when I brought this up, my boyfriend immediately went silent and the topic was changed. I noticed over the days he wasn't as cheery. And then a week or two ago, I managed to find out the whole time he was hurt by me. I made him feel I was comparing him to that kind of person, and that completely turned him off, he doesn't see me intimately anymore. We haven't had intimacy in a little over a month. We used to like every week. We talked about it, I did my best to express to him I did not intend for what I said to come out that way, he is not at all one of those people, but I don't know what else I can do. Intimacy helps me feels desired and wanted. He still talks to and listens to me everyday. Everything is normal except intimacy. I need help, what can I do to help him not feel this way