Coming to terms with loneliness is important. I strongly felt that I had to survive and make it on my own doing the daily physical things. I felt equally strongly about coming to terms with loneliness. You must learn to live with it and be careful not to avoid it by leaning too heavily on someone or something else. Sometimes people lean on others or use alcohol to blunt loneliness.
Extreme caution needs to be taken, especially with alcohol.
You don't want to become dependent on a bottle, nor do you want to wear out your welcome with friends. Remember, the bereavement process takes time. Don't be impatient with it. I call the final stage acceptance. This is when you've done all your crying, grieving and fretting.