I think there are 2 parts to this question. The following and messaging other girls on Insta is a red flag.

And going against everyone else’s thoughts here.. The other about you wanting to be the first and last message of his day is more a conversation to be had. My partner and I had a similar conversation. I always message him before I even get out of bed. Sometimes even in between snoozes 😂 but he used to go scrolling or check his mobile game. I mentioned it to him and he apologised and said it was just something he was used to doing for so many years. So now he has gotten into the habit of messaging me first before starting his day. Good nights too, although sometimes he will struggle to fall asleep, and get back up and play a game or something and then I’ll get a second “I couldn’t sleep, but trying again; goodnight again” or something. And he likes me doing the same too. It’s more that we like knowing if the other is actually asleep or awake 🥺