Looking for advice on contacting a friend that I stopped talking to abruptly a few years ago. This was before I knew about BPD. He was one of my friends from high school and we'd known each other years, until I was about 20 he was one of my best friends.

There was a point when we had a bit of an argument, I got mad in a moment and he decided to spend less time with me. He also wasn't happy about how much weed I smoked, and it didn't help that he thought my mental health issues were so similar to his.

After this we still spoke and met up, just a lot less frequently. There became a point where I stopped replying to his messages for weeks, then one day got irrationally triggered when drunk and unfriended his Facebook. We didn't speak again as I found it too awkward to say anything after. 

Now I'm more aware I'd like to try and message him but not really sure if I should. Any ideas?