I'm also wondering how Uni changed you and whether your W was included in that development of yours?? How would you be able to include her, you might ask? Through communicating with her, through bringing her to things you were doing, through introducing her to the new people you met, through helping her feel comfortable in all the Uni life - which she was not attending herself. Don't get me wrong, it's important that you pursued your Uni OF COURSE! You need to develop yourself and have your own life. It enriches all R's for each S to have their own lives, it's just how it is handled that is the important thing.
Does she continue to not feel included in your life? If so, this is a tough one to crack Bill, and could take time to overcome.
Sometimes a woman having her own life in a M (and not willing to really include her H, or not wanting to change anything for her H) is because she is asserting her own independence as a reaction to her H leaving her out of his life for so long. This is her resentment in action.
I'm wondering if this dynamic is playing a part in this scenario.