how to drop a band member without hurting their feelings?

So our band has a guitarist who I’ll call K. K does not show up to practice, and when he does he hasn’t practiced his part and plays about two notes during the entire hour and a half. Me, the bassist, and vocalist have all decided we want to either drop him, or add another guitarist (so essentially dropping him but not explicitly) but I don’t know how to bring the topic up without him getting hurt about it, especially cause he’s a really sensitive dude.