How can trust by rebuild when you live in 2 different countries?

My ex broke up with me 2.5 months ago.
We are living apart in 2 different countries. I haven’t heard from him since last week when he suggested to me to join his therapy sessions and work through what happened and our difficulties when we were a couple.
We both try to understand eachother and rebuild trust on both sides. We had our first session, it was good but exhausting. He then aswell suggested to do a light phone call today which went fine, we laughed a bit.

Obviously I still have deep feelings for him but wondering what this all means?
How can trust be rebuild when you live apart, think the sessions are a good start?
Would a man do all of this just to be friends?
Taking every session at the time and see what time will bring. Sometimes a deep friendship is also worth a lot.

I’m at least finding myself in the process of transformation, healing inside-out and it’s amazing!