Ask him if you want to just farm for the whole game and never harass each other, i did this before in a 
VS 
Mid lane, it got the the point where we would just farm next to each other's towers and tell our junglers not to gank, and agree to not kill each other, try this and post the match history and maybe a little story.
Woodsy25752 votesAbsolutely not, if I see my chance I'm killing him, this is war
MXXXXXL1 votesThis is why we can't trust you...
4th Chiming Lamb1 votesAlrighty then, I'll try this xD
MXXXXXL1 votesTell me how it goes, link the match history.
Angry Monster1 votesassisting enemy team?
MXXXXXL1 votesOnly if he breaks the agreement and kills you, and it's only 1 kill, you don't have to sit next to their tower, you 2 can just be safe and farm up, this is more of a test thing for fun, if the junglers get involved after you both saying not to gank, report them for not communicating.
TheSequelsRBad1 votesI ask when I play 
, but for some reason no one will do it with me. :(