Small update - I was excited most of the day about my birthday trip alone. Once I got to my room at my destination in the early evening, though, I started to feel so upset and sad that I hadnt received any text, and then I was upset at myself for even caring so much. Around this same time, he ended up texting me. It said "happy birthday - I hope you had a good day today, and I'm sorry that I didnt text you until now." I didnt want to tell too much, so I eventually just replied "thank you." A while later, he texted asking if I did anything fun today. I gave a one sentence answer of "took myself on a trip to [place]." I dont know why he says he was sorry he didnt text me, and am not going to even try to analyze that as it doesn't matter. If he wanted to know actual details about what I'm doing and how my day was, he can call or idk, come back into my life. I took myself to a fancy dinner and enjoyed the rest of my night calmly. I am looking forward to detaching, even though I think that'll be a long and difficult process. We dont have plans to see each other until the 11th & 12th, so I'm not expecting any communication in the interim, as there isnt any logistics stuff that I know of coming up.