Just had sex with my ex

We were together for 3 1/2 years and I ended up leaving him because we wanted different things out of life he did not want to get married or have children I mean we are still kind of young I broke up with him back in  February and he actually ended up getting a rebound chick they are not together anymore and tonight we had sex I do not regret it and I still love him but how can I move on if he still hits me up and wants to hang out should I take things slow with him or just move on