These are normal emotions. I found sadness and anger along with empowerment (after reading DR) to be my most prevalent emotions.
As far as the weekend plans, if you do ask her for a definite answer, make it very detached "something like, hey I am just trying to work out my plans for the weekend,, were you planning on going to the wedding, it is ok with me either way, I just didn't want to leave you out if you wanted to go"
If I was you I would plan on going to the wedding with or without her. If she doesn't want to go then go by yourself. It is a great opportunity to GAL....to show that you can have a good time alone. Remember this is friend of both of you....so it will get back to her. Bringing someone else along will only come off like you needed to bring someone because you were lonely. It might be true but it is time to stand up....you can do it!
Also, if you go to it alone, you can at least say yeah my W was getting set up at school to get her law degree. Is the other person, male or female?
TwinDad Me 39, W 36, M 11 W - MLC, WAW???? 2 Kids B/G 3 YRS Old Start of the Long and Bumpy Road..... On the verge of piecing.....a new beginning