Originally Posted by
tt294 
What is the best way to tell him he needs to get help again
My advice? You don't tell him again.
You already told him, he already responded. Repeating it over and over, in different ways, at different times, will not change the equation one iota.
He's still drinking. There are no ultimatums here, only your decisions. He is an alcoholic. What are your boundaries surrounding that? Do you really want to be involved with an alcoholic? If not then it is time to let him go.
Learn all you can about alcoholism. Read the stickies at the top. Keep posting here. Know what life is going to be like now and in the future if you accept alcoholism into it. It won't be fun, it won't be promising, and it won't be happy.
ETA: At 25 (any age really but especially at 25) I would hope that fun, promising, and happy are at the top of the list of things you want for yourself. Be true to yourself.