Should I be worried about my bfs behavior change?

Lately, my boyfriend, I have been arguing due to little dumb stuff. I’m jealous and insecure so he’s grown tired of that and my suspicions ever since we got into the argument last week, he hasn’t really been himself not as affectionate and not as loving. I was suspicious of him when he changed phones because one of his broke and he got a screen privacy protector and change the pass code so I did give him a little bit of a hard time about it even though he let me see it. But he still calls still texts in the morning but he just seems more snappy. He says it’s because he’s tired. He does work long and just got off working a bunch of Saturdays. I ended up getting upset at him about it. He said he was sorry. Text me in the morning saying good morning babe sorry for the lack of time together I look forward to the weekend so we can spend quality time even though that message was nice. He still didn’t say I love you or call me by my nickname I know he’s frustrated with me but I can’t help it think does he have someone else? Is he seen someone?

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Oh and he’s been falling asleep early for the week and not calling me my nickname or being loving
Should I be worried about my bfs behavior change?
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