Go for it.
I'm in the same place.
I had years of his gaslighting bullshit, he tried his hardest to break me and very nearly did. Not only did he financially, emotionally and mentally abuse me, his lies made my family cover his cheating with a family friend for a whole year. Things with my family still aren't the same.
Around the time of breaking up, I became very unwell, and went from being very active to not being able to get off my sofa, gained 3 stone in weight, started losing my hair, suffered from terrible migraines a few days a week, and more.
When I saw him 6 months after the breakup at a concert of a band we both loved, I was a shell of the person I was. The clothes I had no longer fit, my blad patches were showing, obviously very overweight with a puffy face, and nothing like the person he was once in love with.
It was horrible and made me feel a hundred times worse, there I was dealing with a yet undiagnosed serious medical condition, felt so fat and ugly, still didn't understand the extent of his lies and abuse, and he was his usual fit, cocky, healthy self.
He made a few barbed remarks which really ruined the lovely evening I had been having at that point.
Since then, I've lost tonnes of weight, I feel amazing, I'm OLDing, met some lovely men, having incredible sex, my health is back and I'm in a better place than I ever was when I was with him.
I wish I could bump into him, show him that he didn't break me, that I'm doing better than ok and that I'm not so fat, frumpy lump.
So go for it. Buy a nice outfit, wear the lovely earrings and expensive perfume. Fuck him.