Should I call me ex friend?

I’ve been feeling really lonely lately, and feel like I have nobody.

All of my closest friends, except one, live in different cities or countries. And although I am in touch with the one who lives here, and we see each other at least once a week, she is very busy with university, work and preparing for a marathon.

I had a best guy friend, that I have not been in contact with since last summer. We had a fight over a very stupid thing but it escalated (I kicked him out of my house) and we have not talked since. I waited for him to apologize and he never reached out. That kinda hurt me because I felt like he didn’t care, even though I have never reached out either. From our mutual friends, I heard some things that made me realise he didn’t give a shit and moved on like nothing happened.

For months I was fine and then during winter I started thinking about him and how I miss our friendship, although I might just be idolizing it since I’m very lonely rn. Last winter we hanged out a lot, just the two of us. Everybody else were living far away or were busy, so it was just the two of us hanging out for months. I think being very lonely this winter, I started missing him.

A few weeks ago I got a job at the company he work at. And during training I saw him maybe twice, but we started messaging about work. Usually me asking for help. And then on Monday I officially ended with training and started working. In the office, he sits a seat away from me haha, so I started bugging him a lot, since I needed help often.

I hate how chill we are and how we only talk about work. I messaged him after work a few times, but again it was only about work.

I started thinking weather I should ask him out, so we can talk, but honestly I don’t know what to say. I don’t think he would say no, but I also think he doesn’t really care that much. It’s more of whatever for him.

Btw he is a person that almost never opens up and avoids conflict at all cost. I think he is scared of looking like a bad guy, so in most cases he will tell you what he thinks you want to hear. He is always trying to be nice. And I’m opposite. I need to talk openly with people close to me. I need to know your honest opinion about me if we are close. And that is what was bugging me quite a lot in our friendship. I never felt like he cared, more like he hanged out with me until his best friend comes back home (he lives in a different city) or until somebody he cares about more is free, like I was there just to make his time pass by. And I tried telling him that sometimes I feel bad around him, but he would just say of course he considers me a good friend and that he jokes around with me like he does with his siblings, but I never really knew with him.

What should I do?