<human>: Could you distill the essence of the text into 1-3 sentences?

Backstory: My boyfriend and I have been together for almost two years and we have a child together. He's very into open communication, which is something that has always been very hard for me. I'm trying to be more open with him. But it's a learning process for me.

Anyway, a few days ago we went to visit some family and I went to pick up some food for everyone. I also stopped to visit a female friend at my old workplace. I thought my SO would be upset that I did. When I returned, he asked if I stopped by and I said no. Because I didn't want a silly argument. (Yes, I should have something so small, but I don't like confrontation and fighting so I thought I would skip the fight.) Yesterday, due to a message I received from my friend, SO found out. He was really angry. Not because I stopped by, but because I lied. Which I completely understand. I messed up. But now he's second guessing everything. I don't lie usually. But that was just something that didn't matter. So I didn't think it was a big deal. But of course, I made it an even bigger fight. He told me he didn't care if I stopped by but since I lied, I ruined things.

Is there a way to fix this? Do I just let him be until he seems okay? Or do I talk to him? I don't even know what to say.
<bot>: I told a stupid lie that blew into a huge fight that I wanted to avoid. How do I fix things so he's not second guessing everything?