SEX PAIN

Alright so, I'm 19 and I've been with 3 dudes all of which have been very small in size compared to the last guy I was with/am currently with. (My boyfriend.) So, he's the fourth guy I've slept with and he's very big in size.. roughly almost 9 inches. Problem is I'm very petite in size, and no matter what we do (lube and all) it always hurts while he's putting it in and it's even worse afterwards. I have bled a few times during/after sex with him, but I always keep it to myself, because he gets really upset about hurting me. It's at a point where when I go pee everything stings and burns and it's insane! it's like alcohol on a thousand papercuts! Is there a way to ease the pain a bit?