Im in a long distancerelationship. Am I overthinking?

So my boyfriend and I are long distance. He lives in a diffrent state from me. Our communication styles are different. He is more introverted then I am. Night before last, I was on the phone talking and noticed he was keep falling asleep. He does that frequently because he works hard. He normally works from 8am-7pm, which is a lengthy shift so I don't hold it over his head. He claims that he can't be on his phone at work and he would normally tell me that if his messages are delayed it's because he is busy. But he has recently stopped that. Our communication throughout the day is limited and then when he gets off from work he's tired and it seems as if he dosen't want to speak to me. It's hurtful because I don't want us to lose connection but that's the direction it's heading towards. Last night it was the same thing and I mentioned it to him and he was a little confused and said that every time we call dosen't mean we have to talk and that we must enjoy eachothers silence. I agreed and did that lastnight and when he saw that I was quiet for the majority of the duration, he started talking more and then apologized by saying "I'm sorry of It seemed as if I don't want to talk to you, I do". This morning he apologized for falling asleep. Im just tired of sitting by my phone waiting for him to respond and then take hours to relpy back. I overthinking because im trying my best to but in the effort to maintain the connection, but it seems from his end, he could care less sometimes. What should i do?

Im in a long distancerelationship. Am I overthinking?
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