my gf broke up with me, we talked it over and we still want to be together. She says I need to make a romantic gesture to bring her back in.
Take her out on a romantic picnic, or the first place you guys had a date.
Then eat some ass.
As a girl who needed to be proven that things were going to change, make sure you're actually going to change.
My ex was particularly emotionally, physically, and sexually abusive. I broke things off, and he would do grand romantic gestures to prove that he loved me and that we could make it work.
He made me feel absolutely lovely, but as soon as he got me back, he stopped trying.
Don't try at all if you're not willing to make a long term change.
Seriously though, don't bother if you're not willing and prepared to actually put in the effort to change.
Honestly, if my ex had done that, our relationship probably never would've ended.