Help! Let's Say You Had This (Undiagnosed) ADD Friend ...

[NashVegas]

Who had a habit of making plans with you, but often bailed due to other stuff they forgot about while they were making said plans.

Let's say said friend did something like that on your birthday, you got pissed and flounced out of the room, which made them feel miserable for being a jerk, and later you smoothed things over.

Let's say said friend invited (two weeks later) you to attend a third friend's birthday with them, and asked you for advice on what type of gift they should pick up. And before stopping to think, you, playfully, said "Hey, wait a minute ..." and they felt like a jerk all over again which really wasn't your intention (although it was awfully insensitive of them to ask in the first place).

Please advise ...