Welcome Chels ~
I am so very sorry for the loss of your father.....I don't think it matters how long it's been - it all hurts.
I lost my brother 2 years ago, he has a son that was 8 years old at the time of his death...I see him struggling a lot, I can't imagine what it must be like.
I, too, have a wonderful step father, we are so lucky, aren't we? My step father has now stepped in for my nephew, and it's very touching. I am sorry that your mother is leaving your step father, but perhaps you two will still stay close?
Come back and let us know how you are doing.