Life definitely gets hard at certain times and i can totally relate with you. I use to work 100 hours a week, no holidays no free time. I own a restaurant and several other smaller business. At time everything would be so overwhelming and depressing. Lots of losses made me want to give up everything and just walk away.
However I do not drink. I spoke with my girlfriend, she has been there for me always. I also talked to my family, they were really supportive and at least it gave me emotional support. I'd say you do the same. Talking to people and opening up doesn't solve the problem, but it does gives you some kind of morale support and that's a kick start right?