AIO? My boyfriend doesn’t seem to be over his ex who passed away? Please help me be supportive.

Hey guys. Pls reserve judgment until you read my Whole post. I’m not trying to be jealous, and I don’t feel angry. I just want to know if you think this is a red flag. In 2019, my current boyfriend who I’ve been with for 7 months lost his fiance in a car crash. I always let him talk about her, and I’m never jealous or insecure. But today was the anniversary of her death, and I was a little side swept by what he’s posted on Instagram tonight. He’s been posting stories on instagram, saying she’s his other half, posting old conversations between them, I’ve attached them below. I’m panicking a little but he and I had a normal loving conversation today and nothings wrong. I’m not going to bring anything up to him today, I’ve been supportive and kind. What do I do? Look at what he’s posting…again, I haven’t told him whatsoever that this hurts me deep inside, but I can’t help but feel like I’ll always be second best. He calls me angel too….