From a guy's POV, he probably didn't see it as anything major. Sorry that's just the way our mind's work. Just the fact that he hasn't contacted her is a good sign.
In terms of piecing, you're going to have to understand that it's going to take awhile for both of you to establish trust one another. Don't let one act of forgetfulness or thoughtlessness undermine the larger picture.
If both of you are really serious about piecing, you're both going to have to relax your guard (just a little) to gain trust in one another again.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.