<human>: Give me the gist of the text in a nutshell

My (25m) ex (25f) and I have recently established contact again. We were together for about a year before things ended. We still spend time together from time to time and it's just like how it used to be. We haven't really discussed getting back together. We live 5 hours apart and there is no day in sight that we would get back together officially.

I haven't dated or slept with anyone since our split, I'm very selective with my partners. Should I tell her if I sleep with someone else or ask permission?

I ask because I have been more aware of women being interested in me but am not sure if I should pursue these encounters.

We haven't talked about sleeping with anyone else because sexual history is an impossible topic with her.

Officially we are not dating, I don't know if she has slept with anyone else and I don't know if she has pursued other men. Part of me does not believe she would tell me the truth even if I asked.

As I write this I feel I have already answered my own question but I would like an outside perspective and personal experiences.
<bot>: ex and I still spend time together, we are not officially together but when we spend time it feel like when we were dating. Should I discuss sleeping with other people?