Hi OP
You have my every sympathy.
I left my ex when my DD was 11, though he wasn't her dad and she was glad to be out of there so that helped a lot.
However she did hate me dating, they do seem to ahve a stage at this age where they get very jealous and also are starting to become sexually aware but find it all disgusting and repulsive and really struggle to deal with everything that's starting to go on for them with understanding relationships and hormones all going a bit wild.
I got around it by dating in the daytime - lunchtime coffee meets and have been lucky having met and had relationships with a couple of self employed blokes (not at the same time though!) in the past who could re-jig things to be able to meet me in the daytime. When they go for sleepovers with their friends that is also very handy - I used to have a few of her friends over regularly in the hope the favour would be returned and it usually was.
How I dealt with it was to stop all mention of men ever. Don't mention fancying anyone off the telly, nothing. Definitely no details on your personal life at all. As far as she is concerned you are a nun and not interested in dating.
By the time my DD was approaching 15 she had begun to get her head around it all, was interested in boys herself by then and so understood things a bit more, extra maturity makes such a difference. She then started to accept me dating and/or having a boyfriend/partner.
At your dd's age it's no good having men over in the evening, she's not far off from having later bedtimes and possibly teen insomnia and it just isn't workable.
Good luck!