When you make mistakes you tend to make your mistakes right.
In every mistake there's a thing that you learn.
There's a saying that goes "You won't gain anything by loosing nothing."
So after we make mistakes we already know what to do next and would never commit that mistake again.

Just not doing same thing again. Normally mistakes hurt so doing that again is not loving yourself. Now, as human beings, everybody can think that "this time will not be a mistake" wrong, very wrong, a mistake is a mistake and no matter if you did that once, the best you can do is fixing it and once for all, only way you can say you are growing.

i tell myself i screwed up but i have to live the present and just keep it in mind

Usually I'm too proud to do the same mistake twice but... I've got a terrible memory, too!