Interesting post OP. I’m older than you but in a similar position. When my DCs were around 11 and 14 I felt ready to meet someone but then DD had a 4 year period of severe mental health problems and caring for her took up everything I had. Dating wasn’t even on my radar.
Similarly to @illthoughtout my DCs are 16 and 19 and I am needed increasingly less at home. I have always kept up good friendships, gym, doing interesting stuff at weekends been busy with work but this period of feeling almost redundant is quite unsettling (though can also feel freeing!)
I have done a bit of online dating over the years so I am no stranger to it but now I am putting the effort in properly.
I have mixed feelings about being single v in a couple.
Being single all of these years has made me into the independent person I am now. It’s incredibly freeing. I am able to make decisions and do stuff that my friends rely on their DHs for and I have grown to relish my own space and time.
I don’t miss sex - I think @Jellybunny98 nailed it for me - if I was with someone and we didn’t have sex I would miss it but being single - I don’t miss sex for the sake of having sex! I do miss having someone to do stuff with - weekends away, doing new things and just someone for whom you are their priority and them yours. That feeling of care and feeling loved. But I would only give up what I have for a relationship that enhances my life. I don’t want any drama or a manchild!
A cautionary tale to the OP as I am 15 years ahead of you.. 1) I worry I have become ‘too’ independent and set in my ways now and 2) There are loads of gorgeous women on dating sites at my age who have really looked after themselves. The men? It’s slim pickings so don’t leave it too long if you decide you do want to meet someone 😂