There's a first time for everything

Never in my LoL career have I ever had this happen. Over 3k matches, been playing since S2, still having 1st time experiences.

I pick (a squishy melee assassin) and my jungler is (a big bad tank). I leash blue for Hecarim as I'm supposed to and he freaking backs away, so I get aggro. Of course I start with . Blue buff resets!!!!!! He goes back in and pings me to help again, then he runs to bush, causing my next attack to draw aggro!

Long story short, I go into lane 2 levels behind, with 30% of my max health and no health potions. I get hit with a full level 3 (all abilities and Thunderlord's Decree) combo and die. Top laner level 4, I walk back to turret, still level 1, no need to waste a , knowing I'll need to recall soon. Enemy jungler and top laner (both level 5 now), dive me under my turret and kill me (still level 1).

Then Hecarim has the audacity to say, "Top lane feeding, GG."

So, I came to the boards to ask for advice. What would you have done in the jungle if your jungler did that while you were leashing? I need real answers. I thought I did the right thing by still helping, but afterwards... I have my doubts.