MUE, I know I am not YOUR friend, but if a friend came to me telling me about what happened in a situation like yours, I would be 100% sympathetic towards them. I would not judge them or be disappointed. Because I know they feel awful about it anyway, and me adding to that doesn't help. What I would do is talk with them, ask why they think that happened. Encourage them that its ok, setbacks happen. You are still moving forward despite some sideways/backwards steps along the way. That I am still there for them.

I don't think I'm an extraordinary friend by any means, and if you do trust this friend, I hope they would react similarly.