Am I being used?

My boyfriend of a year and I broke up a month ago. We are still friends and still hang out and... we do still have sex. I think he’s trying to butter me up just for sex. He told me he still loves me and got mad when my coworker flirted with me. So he still kinda cares. We are going to a beach vacay for a few days together. And we plan on doing fun stuff. The problem is I noticed yesterday he randomly held my hand and would put his hand on my leg and hugged me and kissed me and after we had sex he kinda became different like not affectionate. Then today he ignored my texts and is short with me. I think I am being used but I don’t want to jump to conclusions yet. I do love him very much and I am waiting because I do believe we are getting back together. I just don’t know what to think about the recent behavior.