argh, drunk-dialling isn't exactly the best idea - it'll just amuse/annoy him. my ex got heaps of "drunk" smses and even emails from his ex, and it pissed him off to no end. delete his number from your phone and surround yourself with friends.
no matter who did it, break ups are never easy... but try and look at it this way: "okay. i want him back, even though he dumped me. things will never be the same if we get back together. he obviously broke up with me for a reason - why should i want to be with someone who doesn't want to be with me?"
the main thing people miss is the companionship - having someone to always fall back on, call when you had a shit day, meet up with when you need a hug. remember, you have friends for that too! so go and get busy with your girlfriends.
oh, and drinking might make you forget in the short-term, but you'll wake up and it'll all come rushing back... along with a massive hangover!