My boyfriend said something during an argument that I can’t unhear

We had an argument a few nights ago. Honestly, it wasn’t even about something major. Just one of those small disagreements that should’ve ended after 10 minutes. But in the middle of it, he suddenly said: “You’re exhausting to deal with sometimes.” And ever since then, I can’t stop thinking about it. Not because it was shouted. Not because it was dramatic. But because of how honest it sounded. The argument eventually ended, we both calmed down, and the next day he acted completely normal again. But I wasn’t normal anymore after hearing that. Now every time I talk about my feelings, I stop halfway and wonder if I’m being “too much.” Every time I get upset about something, I question whether I’m just difficult to love. And I hate that one sentence has managed to stay in my head this long. What makes it worse is that I know people say things they don’t fully mean during arguments. But sometimes I wonder if anger just reveals thoughts people usually hide. That’s the part I can’t shake off. Because if someone loves you… are they secretly feeling drained by you too? I haven’t brought it up again because I don’t even know if I’m overreacting at this point. But honestly, that sentence has been replaying in my head for days now.