Your weekend sounds really wonderful. Her actions are showing love, even if she is not able to say it. I'd rather have it that way, than the other way around.
I'll guess.....I think she is afraid to hurt you. She is having stupid feelings yet, conflicts inside herself, and to share them with you would just make them more than she can handle. She'd have to explain them to you, and I don't think she understands them herself. She wants to never say "I love you" again unless she is absolutely sure about it and it feels right and natural. She may be thinking that she said it before and felt it before when she said it to the OM and look at what happened with that.....that's confusing to her.