What is the main conflict in High Fidelity by Nick Hornby?

High Fidelity is a novel written in 1992 by the British author Nick Hornby. The story detail's Rob Fleming's struggles to cope from the break up of his relationship with Laura and his failing record shop. A major part of Rob's problem is his habit of replacing his real opinions and feelings for a series of lists. When he breaks up with Laura he makes a list of his top five relationships and goes on a mission to discover where he has gone wrong.