You gotta get that window of oppurtunity where you say NO MORE. You have then gotta make the absolute commitment to stay sober at all costs.
IMO this involves total and utter acceptance that you are an alcoholic or you're wasting your time.
Involves the acceptance that unless you actively work a 'programme' of recovery in some form then your alcoholic mind will get you drinking again.
Keeping sober is hard work at times to be honest, you also have to accept this. It can be very tedious at times, especially being 25 (I got sober at 23 and now am 24). You have to accept that your sobriety has to be NO1 priority in your life, otherwise you will be right back to square 1 again.
When you see all the smiley, happy people out on a Friday/Saturday night in city bars/pubs/clubs you have to have absolute acceptance that for you those smiley, happy times are a fairytale-tale and that you're an alcoholic so there is no such thing of a nice, civil happy time drinking with pals again. EVER.
You will have to change your life and embrace 'recovery' from alcoholism as your main priority in life, everything else will naturally fall in place around it.
But most of all you have to want to be sober more than you want to get wasted. Sometimes you will feel like the reverse of this but if you have made a commitment to sobriety then you don't drink at all costs 'just for today'. That is all you need to do.
With time your compulsion and desire to want to get wasted will vanish and you will feel totally indifferent to alcohol/drugs. I guess that is when you know that your recovery programme is doing its business. Be aware that you are only ever 1 drink away from losing everything all over again.
All The Best x