So much of this thread has resonated with me. I was very attractive when I was young with lots of attention - which on reflection did make me feel uncomfortable but I didn't know how to handle it.
Fast forward, I am now 52. I've maintained my looks/body as far as I can and I still get compliments and attention but it's very different. I feel very much a mother/parent and not the person who I was or indeed who I want to be if I'm being perfectly honest! I feel like I'm acting a part, not my real self.
And I do feel I am becoming invisible and totally empathise with OP. It is amplified even more when I see my beautiful daughter who is pretty, intelligent, hard working and full of life - she has a constant string of male admirers (and is repeatedly told she looks like me!) A few years ago we were told we look like sisters (she is a replica of me in my youth) and somehow this makes it even harder!
I am very lucky, I have a loving family, a wonderful life and there is nothing I should be unhappy about. I see my daughter and I see myself - it's hard but at the same time I am so happy for her, knowing she has her life ahead of her.
The HUGE difference is that she is full of confidence and determination - with hindsight I was the opposite, not knowing how to deal with the attention and having to cope with male attitudes in the 80's when I was in my 20's.
I can't quite express the emotion I feel though when I see her as a replica of me - I'm proud, happy and full of love but at the same time there's a tinge of jealousy. Or perhaps that's too strong a word, but it's a certain wishing I could have it all again with the confidence she has.