"Do you like me?" 💔💔

My 3 year old asked me this yesterday and I'm absolutely heartbroken that he would think he needed to. We were trying to get ready to go to my mum's house. It was around 30°C and we were going back and forth, with him refusing to put on sunscreen. I said no sunscreen, no leaving the house - nothing new. It took a LONG time, finally got it on him. Next there's the battle with the shoes. I was trying to get him to come back to me because he kept running away. This went on for several minutes, he thought it was hilarious. I was saying "come here sweetie, get your shoes on please" but I was in pain (chronic back pain) and just wanted to get out of the house already. But he must have felt my frustration, because as I was putting his shoes on he asked if I like him. I obviously reassured him that I both like and love him, we had a nice day/night. We had the time today to just play for hours and he was happy as a clam, telling me he loves me etc. I know they just say things but I can't shake this guilt. I don't want to forget it because it's a failing on my part.