Why god. The fact I die cuz some guy added lifesteal

My friends luck in SMP; my luck in smp; 38 diamonds in one trip, ONE! nooooo help I need food, I have 3 hunger bars, 4 hearts, 3 skeletons are shooting me, my armors gonna break in a minute, my shield broke, Our base is 20 blocks away guarded with 3 creepers, 5 spiders, 6 skeletons and 7 zombies