Thoughts?

So been dating exclusively for six months. He’s older than me and he’s super close with my two boys. Saturday evening my youngest which is 11 was giving me a hard time about going to bed. My SO was getting annoyed. So I got him in bed then my SO was packing his bag to leave. I stood in the way of the door in panic and upset. He said he was going to his apartment. Well I cried when he left and I sent a few text. He responded with this with text once he was home Saturday after leaving.

I have to walk away from this.. I’m sorry (my name).. i’m not your guy

What would you do? Assume it’s over? I’m just shocked as I was slow to open up to him but he assured me it was okay. So broken right now. Not sure how to go and think. I can’t stop thinking about this and trying to make sense of it. Today is Monday and I have not heard from him. This is the longest we have gone without speaking since we met.

It’s over right?!