Yes Mothers Day is hard for most here. We had quite a thread about trying to find a Mothers Day (or Fathers Day card) for our Moms last year I think. How to get one that doesn't make you feel awful yet nice yet noncommittal. But either our Mom was the alcoholic or she was the enabler. Either way it was no fun. My Mom as he enabler and she did a lot of the same things, taking my older brother into her confidences about what a terrible husband our alcoholic Dad was and crying on his shoulder but never doing a darn thing about it. She started doing that at a really young age for him too, like he could be of any help. What a selfish thing to do. Children should never deal with adult issues.
I hope you can find a group for support while you are living there, that would help a lot. One semester is not too long if you have to live there. Congrats on the up coming graduation.