[26F] Am I overanalyzing this?

Hi there, I’m feeling a bit uncertain about my relationship with my boyfriend, and I’m not sure if I’m just overthinking things or if there’s genuinely something off. I’m a 26-year-old woman, and he’s 26 too. We live a few hours apart, and while he’s incredibly sweet and we truly care for one another, our dynamic feels a bit strange lately. He recently spent three wonderful weeks with me, but since he went back home, things seem different. It used to feel like he was genuinely eager to talk, but now it feels somewhat forced. Sometimes, I get the impression I’m pushing him to engage, as he often responds with just a word or two, making it difficult to continue the conversation. He appears distracted by gaming, football, or his phone, which is understandable, but it would help if he communicated that to me, saying something like, “I’m busy right now, but I’ll talk to you later.” Instead, I sense he feels obligated to reply, which leaves me feeling like I’m a nuisance. I’ve told him that if he ever wants to take a break from chatting, he should just let me know. He insists he enjoys talking to me and that I’m not bothering him, yet I can’t shake this uneasy feeling. It's really disheartening for me, especially since this is my first relationship. I find myself questioning if this is a normal phase or if I’m just overanalyzing everything. I'm hesitant to express my feelings for fear of getting it wrong.