Me and my ex

So when me and my ex boyfriend broke up 4 months ago, 2 weeks after our break up he text me saying he missed me and he wanted me, he wanted me to sneak out of home and he would take me to his house. We did this about 2-3 times a week. We would lay in his bed and just chat then we would have sex and then chat for ages again, and I would fall asleep and around 5am in the morning he would take me back home. On this very day we still talk like we are in a relationship. Is this normal?