It is obvious Kevin is suppressing his grief over losing his father. Whether he is directly (or indirectly) responsible for his father's death (as implied by the last scene of the first episode of the season where the camera lingers on Kevin's leg clearly in a cast) remains to be seen, but we as viewers are well aware that Kevin's denial of his loss will prove detrimental to his future, and may have played a role in his past transgressions.
Which begs the question: are there any memories you are repressing and telling yourself it was a long time ago? What memories mean something to you, and which ones do you dismiss as being a long time ago? Do you think your repression has proven a detriment to your emotional and spiritual well being? As you recall memories from your past, have you fully dealt with the emotions tied to them? Like Sly said, there's no such thing as a long time ago. Putting off your emotional pain can cause a rift in the health of your future.