History
How many examples of clubs keeping players despite them wanting to leave do you want me to list?
Utd kept Ronaldo for another year when he wanted to leave, Arsenal kept Fabregas for another year when he wanted to leave, we kept Masch for another year when he wanted to leave, Spurs kept Modric for another year when he wanted to leave (and even refused to play).
Realistically the club know they're going to sell Suarez in the next 18 months it's now about the club doing what's best for them. If a decent offer doesn't come in this summer then he won't go - the club will have a month to settle him down after the transfer window ends before he's available to play and Suarez only knows one way of playing once he's on the pitch. The club also know that worst case they'll still be able to get the £30m odd that's been offered for him next summer anyway.