It is important to feel your emotions so you can deal with them. I know it is hard, I too supress my emotions. But sometimes the emotions are too powerful to deal with right away. It is ok to store them away as long as you do address them sooner or later. It will do you nothing but harm if you completely ignore them and continue to do so.

If you don't want to visit family for Christmas then don't. I think it would create more stress on you then not going to see them. I love my dad but that doesn't mean I have to go see him. Do what you think is best for you