MV, I'm sorry you feel so low. I think you need to shift your perspective slightly. Reading your posts on this topic, it is clear to me that you are normally a strong person who isn't given to wallowing in self-pity. That's the funny thing about problems. You can always find someone with problems worse than your own, but it doesn't change the fact that your problems feel worse to you because they are yours. You're entitled to feel low without giving yourself a hard time about it.
Although I don't know you, I would hazard a guess that if you post on here in a month or two's time, you will be in a very different position. Christmas is a time of limbo for anyone who wants to change their circumstances. No one can get anything done! I bet that once all the decorations are put away, you'll get yourself a new job and part of your problems of boredom, financial stress and general disatisfaction will mysteriously evaporate. The worst kind of stress is the kind you are powerless to do anything about, which is where you're at now over Christmas. Come New Year you'll be able to do something about it, and just tackling it will make you feel more proactive and better about life.
Regarding the drinking, I'd echo what thumbwitch said: you are not your family. The fact that you have the self-awareness to recognise you are drinking maybe too much suggests to me that you are not an alcoholic and will indeed be able to cut down. Next time you go shopping, take a look at the non-alcoholic wines or interesting soft drinks to find a substitute. There are some lovely low-alcohol or alcohol-free drinks out there now.
A word of advice about looking for love which is a bit patronising (sorry) but I think needs to be said. If you're lonely, then fine. Wanting a special relationship with someone is part of the human condition and does not imply neediness. If that's you, great and I hope you find someone soon. If you're looking for a man to make all your problems disappear however, I'm afraid you're on a hiding to nothing. No man can make your life magically ok - only you can do that. And if you're really vulnerable when you look for someone, you run a very real risk of picking up someone who will exploit or abuse you. Sorry to be harsh, but I think it's important to realise that a relationship has its best chance of working when both partners are at least someway satisfied with who they are and the state of their lives.
You sound like a strong person who will bounce back very well once the festive season closes. Good luck.