I’m really happy to hear you have someone to talk to. Venting to internet strangers can for sure help, but can’t compare to real life friends who care about you and understand your situation much better. And that’s such a great way to think about the couples therapy proposal; that’s a perspective I didn’t even consider when writing my comment. No matter how you decide to move forward with all of this, I hope your heart heals well. Stay strong!
How often do you bump into each other? If you can rely on there likely being a next encounter, break your approach into smaller goals. Like the other commenter said, start with a “Hi” next time you see them. Then the next time add a little “how are you?” Build upon each interaction. Once you establish the super casual familiarity with each other, you’ll (likely) be more comfortable with expanding the relationship in whatever direction you see fit. Small, achievable wins lead to bigger, more exciting goals!