How to fix flared teeth after braces? (Photo)

I had my braces on when I was about 15 and I am now 19. When I got my braces off my teeth were angled out diagonally which I found out is called Flared Teeth. I had 5 teeth removed during my brace treatment and also never got elastics so I’m not sure if this would’ve helped the problem. I was wondering what the best treatment would be to fix my flared teeth to sit flat. Ideally I don’t want anymore extractions.