I started talking to this guy more seriously this semester we had sex once. Before we had sex everything was cool and we spoke a lot and were really getting to know each other and after we had sex nothing changed and we both kept the same energy.

He recently told me he did not want to be in a relationship and that was cool with me I respect it and we were all good. But recently everything has changed he barely talks to me and acts like he does not know me at times. Should I ignore him and keep it pushing or asking him what’s the problem? ( ps we also work together)