Guys, does it sound like he is hiding something?

So I’ve been in a long distance thing with a guy for about a month now. Everything was going fine we would talk every night on FaceTime and he’d text me throughout the day and told me he wanted to possibly date.
I came down to meet him in his city. Everything was fine we stayed together in my hotel but I noticed he kept his phone in his pocket the entire time. Like even during sleeping, in his pocket. I got a glance at it and it was on DND but I ended up asking him why he did this and he admitted it’s because a girl from his past he has no interest in hits him up sometimes and he didn’t want me to see it.
Should I end it or am I overthinking it? I just feel like if that was the case he would have just blocked her and while I know he doesn’t have a secret girlfriend because we just spend so much time together and he rarely was on his phone in the 3 days we were together, I feel like he’s hiding something despite telling me we were on the road to a relationship.

Guys, does it sound like he is hiding something?
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