How to get my rabbit to trust me....?

ok so i have 2 dwarf lionhead bunnies i have had them for months now byt they wint let me hold them or pet them. if i try to pet them they feak out also i to hold them but they start squirming an jump, they live out side in a little hutch. also when i let them out in my back yard they run away when i try to put them back i cant just let them walk inside thier cage because the door is ontop, one lets me put on his harness but the other wont please help