Kris, all the advice above is excellent.
I lost my Dad when I was 22, looking back and thinking about it it I never opened up and spoke to anyone, I treasured the memories and the good times and slowly moved forward, but the process cost me my job at the time.
My Mum passed away in 2000, I couldnt sleep, I snarled at everyone, I was so stressed you wouldnt believe it. I was offered anti depressents (piled them up in box) but some how I knew they were not the awnswer for me. It took over a year for me to start sleeping just a few hours at a time, but I got there.
The one thing I learnt was my partner suffered most of my stress, she understood why and tried to getme to open up and talk about it. Sadly I am an awkward sod that very rarely lets people know whats really going on inside, but when I did open up it really did help.
The only advice I can offer is, as mentioned, the booze wont make any better to deal with. Anti depressents may help, talk with people, your partner and your Doctor, but at the end of the day you know how you feel about taking them. But open up to your partner, let her in, tell her how you feel. give her a hug and sob your eyes out.
Just remember Kris, it's good to talk