People being "madly in love"

I follow a colleague on Instagram and she is posting pictures of her and her boyfriend. They seem to be “madly in love”. This is what she writes at least. My brain tells me: “She seems to be more than 50% happy.” When I was “madly in love” with a boyfriend of mine in the past, my brain also tells me I was more than 50% happy. Even if it seems not so true… I mean, it was wonderful at the beginning, but also kind of insecure. And then, it was a more and more “normal” experience. But I wonder if “idealizing” the person you are sharing your life with doesn’t bring you more joy? But is this not something you are creating and don’t have control over it? So, it’s not a lasting experience? Thank you for your precious comment.