Keep in mind that she's already moved on. Any contact she has with you, she's only doing because you're requesting it. She's eventually (and ultimately) going to start turning you down when you ask for a bit of time to chat, or just to hang out.
Your best bet is to distract yourself. You were spending a lot of time with her, and thinking about her, and now there's a void. Recognize that you were sacrificing certain things so you could maintain the relationship - now's the time to dust those things off, and fill that void with things you enjoy doing. Make sure you don't make drinking a hobby or habit - and keep in mind there are other things that you shouldn't delve into as a distraction, but do move on.
If you've had friends who you've turned down because you usually had plans with her, call them up and get together.
If you put off games, or movies, or other entertainment because they didn't quite fit your schedule previously, or they didn't fit her tastes, go back and revisit those things you missed out on and left behind.
Figure out where you want to be in 5 years, and pursue the paths that can take your there.
There are a ton of people who are just as lonely as you this holiday, and I bet you know a few off the top of your head. Call them up and make plans to hang out - not with any expectations of developing a relationship, but just so you can have an enjoyable season. Next year, once the holidays are done, start hanging out where you will find and meet new people, put yourself out on a limb, and start asking people out on dates.
Keep in mind that this pain is temporary, and you need to focus on where you want to be in 5 years, and if that includes a long-term relationship, then keep moving forward despite any setbacks. Do what you need to do to get to your goal.
Your best bet is to distract yourself. You were spending a lot of time with her, and thinking about her, and now there's a void. Recognize that you were sacrificing certain things so you could maintain the relationship - now's the time to dust those things off, and fill that void with things you enjoy doing. Make sure you don't make drinking a hobby or habit - and keep in mind there are other things that you shouldn't delve into as a distraction, but do move on.
If you've had friends who you've turned down because you usually had plans with her, call them up and get together.
If you put off games, or movies, or other entertainment because they didn't quite fit your schedule previously, or they didn't fit her tastes, go back and revisit those things you missed out on and left behind.
Figure out where you want to be in 5 years, and pursue the paths that can take your there.
There are a ton of people who are just as lonely as you this holiday, and I bet you know a few off the top of your head. Call them up and make plans to hang out - not with any expectations of developing a relationship, but just so you can have an enjoyable season. Next year, once the holidays are done, start hanging out where you will find and meet new people, put yourself out on a limb, and start asking people out on dates.
Keep in mind that this pain is temporary, and you need to focus on where you want to be in 5 years, and if that includes a long-term relationship, then keep moving forward despite any setbacks. Do what you need to do to get to your goal.