Is my bf ignoring me?

Hi everyone. So yesterday my boyfriend and I exchanged maybe 4 texts and i haven’t heard from him since 9:30 yesterday so i called him today at 4 to talk cause I’m on vacation and miss him. He seemed a little distant on the phone but still confirmed like when I’m coming home and stuff and after 30 minutes we said bye and an hour later he sent me memes on Instagram. I responded a few hours later and then i texted him pictures from my vacation that he asked for and he read it and never answered. I’ve barely talked to him since Thursday and it feels like he’s ignoring me. Is he? Am i over thinking? Please help:(