Sex with my fiancé 🙁 LONG post

Sooooo our sex life has always been a little weird and it’s starting to get to me. We started out as friends and then started dating so the physical part was a little awkward at first. But now we’ve been together for almost 3 years and have been having sex for almost 2...yes he wanted to wait so we waited a YEAR before we had sex. He has some trouble with erectile dysfunction which really really put a strain on our relationship for a while. He’s only 33 and has seen multiple doctors (including a psychologist) that all say he’s too young for this problem and give him meds to slap a bandaid on it instead of trying to figure out why. He is now using an injection to get erect. Which is humiliating but I just try to forget about it and pretend I don’t know what he’s doing in the bathroom. But anyway, we have only had sex in our bed. Like he won’t do it anywhere else no matter how hard I try. He is also sooo lazy. He uses my vibrator to turn me on. Which doesn’t always work. I’ve told him over and over and over that I don’t want him to use that. But he gets it out of the drawer every time. Finally last week I took it out of his hand and said don’t fucking use this thing. So last night we decided to shower so we can have sex. He wouldn’t shower with me because “I’ll make the water too hot.” So anyway he came in there and I suggested me had sex somewhere else in the house but he shot me down. So I put my head at the foot of the bed and this dude wouldn’t even fuck me like that. He said that he wasn’t having sex with me unless I turned around and put my head at the top of the bed. Like omg. You can’t even fuck me on this bed backward. Anyway, this is really getting to me lately. We get married later this year. I’m so nervous that I’ll never have the sex life I want/need/desire. I should say I’ve been with 10 guys before him and he has only been with 1 girl before me. I just crave a good dick down honestly. I want him to take charge, fuck me because he wants me, right then and there. Like we literally plan sex for when it fits in his schedule best. It’s never ever spontaneous. If I’m feeling it randomly and try to make a move he shuts me down and says he’s too tired. I just don’t know what to do. I try to talk to him but nothing has changed.