Sexual frustration! NEED HELP!

Hi there, I need some help. My bf and I have been together for almost 2 years and I love him dearly. We’re currently planning on getting married BUT for some time now I’ve been hiding the fact that he no longer satisfies me sexually. I’m heartbroken because I do love him but it’s hard not getting the kind of “love” I need in the bedroom. He’s not biggest by any means but I didn’t let that get in the way when we started dating but as time went on the more frustrating it got. Different positions, porn, toys haven’t helped. I still find myself finishing on my own or having to think of other things to get me there. On top of his size he’s very curved to the left and most positions hurt me but he enjoys everything and it’s stressful because at times it doesn’t seem fair that he’s enjoying way more than I am and I’m the one that pretends I do so I won’t hurt his feelings. PLEASE HELP!!