Immature

I'm making stupid choices I thought I'd outgrown. I'm too old to be doing these things, so why am I doing it? ...partly a lack of personal effort in edification...partly a need to feel accepted and wanted...partly a desire to be young and carefree...partly-I don't know--a lack of feeling because I've already been numbed by the other pains.
I know that I shouldn't want to but I no longer know why/want to avoid it....and my only excuse to avoid the situation is a selfish desire to avoid the physical consequences, although even that is not much motivation.
If self control is a muscle, mine has been stretched and strained to the point that I can no longer use it. So what can I do to avoid stupid mistakes? Correct them?
And what if it's too late?

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She went her unremembering way,
She went and left in me
The pang of all the partings gone,
And partings yet to be.
~Francis Thompson