My boyfriend recently started working and doesn't have time to text me from 9 AM to 9 PM. Should I consider breaking up, or am I overreacting?

My boyfriend goes to work at 9 AM by bus and reaches around 10:30 AM. He listens to music on the way and doesn’t contact me. He’s busy at work and doesn’t text during the day. He leaves the office at 6 PM but hangs out with his female coworker for an hour every day, and they eat together. They take the bus home together, and he says he can’t text me during that time because it would be disrespectful to her since he's the only one she's with. He reaches home at 9 PM and starts texting me then, but I usually go to bed around 10 PM, so we barely talk for an hour, if I’m free. He sometimes texts during the day but mostly doesn’t. He gets annoyed if I’m not free after 9 PM when he wants to talk. I sometimes avoid talking to him because I feel like I’m always available for him, but he doesn’t respect my time. I’m in my final year of college, and while I make time for him, it feels like he doesn’t do the same. What should I do?

My boyfriend recently started working and doesn't have time to text me from 9 AM to 9 PM. Should I consider breaking up, or am I overreacting?
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