Need advice regarding contacting ‘ex’

Wasn’t sure who to ask this and mostly just need to talk it out.

I have been thinking about my ‘ex’ a lot and for a while. I believe in signs and I keep seeing things that are very him.

I say ‘ex’ because it was a complicated situation. Our relationship never really got off the ground. But we started as friends, and I really miss that. We’ve messaged here and there throughout the years.

Since the last time we were in contact I discovered I’m AuDHD. He has ADHD and I’ve really wanted to talk to him about it. It now makes sense why we seemed to get each other on another level.

I’ve messaged with a few people on here and someone irl. That’s what made me want to talk to him in the first place.

I feel like this isn’t a typical ‘don’t contact your ex’ situation. But am I just telling myself that? Is it just my autistic need for everything to make sense?

I’ve waited through Mercury retrograde and my luteal phase and I still really want to talk to him.

Help!