Could I attempt friendship with an ex?

I dated someone two years ago, he broke up with me, and it was messy on my end. I got over it about 8 months later and had neutral thoughts about it. It's been two years and recently something horrific happened with his family. I sent an email with words of empathy, care, and concern, not expecting a response because it was for him from a place of care.

He responded saying it was mature of me to reach out (not that I wasn't mature before but this showed maturity) and appreciated my kind words. He shared vulnerabily some things and thanked me again. I responded to him, asking about his sister and ended it with "take care." The tone came across as the end of the conversation, so he responded once more answering me and thanking me again for being kind and also ended with a tone of ending the conversation. I didn't respond and it's been a few days now.

We had a long-distance relationship in different states, so friendship in person wouldn't be applicable. But do you think it could be possible or that he could be open to it? Or if there's any point to it.

On the other hand, I don't know if I would come across any particular way if I reached out again. He seemed open to having a longer email exchange, but I kept it short because I didn't want to take away my initial reason for contacting him. It was about him, not trying to shift it to anything else.

Could I attempt friendship with an ex?
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