btw, what happens if we come 6th? what has to happen for us to get into europe?
A miracle I think.
IIRC
If the two FA Cup Finalists make the top five in the league or if Liverpool (League Cup Winners) make the final and the other finalist finishes in the top five, the sixth placed team will go into European competition.
Alternatively, if Liverpool (League Cup Winners) make the top five or win the FA Cup with the other finalist making the top five in the league, the sixth placed team will play in European competition.
If both occur, sixth and seventh in the league will go into European competition next season.
As a side note, I think there is a fair play award which gives an extra place in the Europa League.
EDIT:
Basically, the top four go into the Champions League (unless an English team outside the top four wins the Champions League, when the fourth placed team goes into the Europa League instead)
Fifth place goes into the Europa League (unless they won the Champions League)
The FA Cup winner goes into the Europa League (unless they have already qualified for European competition when the Runner up goes in (unless they have already qualified when sixth in the league qualifies))
The League Cup winner goes into the Europa League (unless they have already qualified for European competition when sixth place in the league goes in (unless they have already qualified when seventh in the league qualifies))