Me and my partner of 2+ years went out on Friday night with some friends and I ended up going home early hours of the morning without him (which is normal and totally fine with me). He stayed out longer and by 9am the next morning he was still not home. Naturally I text him asking where he was and it turns out he had met some friends and went back to theirs to carry on the party. Now this was totally fine, only I wish he had let me know so I wouldn't worry or think the worst. He told me he was fine and that he was "just having fun".
He eventually came home late afternoon on Sunday however, during this time I had to reach out to him multiple times asking him to keep his phone charged, let me know when he'll be home, give me updates etc. Each time he gave me an ETA, he would not follow through and I had to ask again. Eventually he told me that I should not expect a text with an update as he knew I was sleeping, I was home so he was not worried about me and I should "grow up".
On his way home, he text me saying he was on his way, he's sorry and we can talk later.
I have not spoken to him yet and I'm concerned he will brush it off as just having a good time and not needing to update me throughout the night as I can clearly see his location and I shouldn't have been worried.
What's your thoughts and how should I approach a conversation?