My (25M) BF and me (27F) were walking at around 9pm at night in the city to go to the grocery store, and he kept looking behind us every 30 seconds or so. I asked him what he was doing because it puts me on high alert when he (or anyone) is constantly looking around. He said he is just checking our surroundings to make sure he is aware of what's going on around us. While that makes sense occasionally, I told him I don't feel comfortable with him doing it constantly because in my head, we are simply relaxing and having a nice walk but he is distracted and worried/fearful of what could happen.

I told him my concerns and how it makes me feel, and he said he understands my worries, but that he's not looking around us because he is worried or fearful, he's just looking around to be aware of what's going on incase something happens. He gave me an analogy of: "It's like when you look both ways across the street to see if cars are coming. You're not terrified or panicking that you could get run over, you're just looking both ways to make sure it's still safe". He said he's watched tons of videos where criminals will just "suddenly show up" and how "If the victims were more aware, they could've done something about it". But I grew up in the city, and while I maintain awareness I'm not paranoid when I'm out.

But I don't know how to feel. I understand his worry to look around us while we're walking at night in the city, but I don't like the fact he has check the surroundings constantly. I feel like we can't enjoy our time together because he is distracted on our environment instead of us.

Am I being too sensitive here? I don't think I'm being unreasonable, but idk.

EDIT: He doesn't do this all the time. There was another scenario where we were walking in the day at a dog beach, and he never looked behind us. I asked him about this, and he said he didn't feel a need because it was a more public, open, and "day time" place, compared to the city street at night.