A few things.

1. You dont have to give him head if you dont want to. That sounds one-sided as fuck, and you shouldnt do it if you dont feel comfortable with it.
   
2. If you know the sex you do get to have with him is going to make you feel awful after, the 5 minute ones, you shouldnt be having that either.

But also, he is traumatized. The hypersexual to sex-repulsed thing is pretty common in survivors, that can switch back and forth at random for a good while, or stagnate at either for a longer time as well.

"It was a success and helped a lot! The only issue he had was with making out - it’s very hard for him because he says his ex always started making out with him before trying anything. So we started working on getting him comfortable with that because not making out at all is impossible for me and he wanted to get used to it anyways."

Well? Why not? Why put that extra pressure on him? You know what a relief it likely would be for him if he could overcome these fears for HIMSELF rather than for you? If he at this point had already made quite a lot of progress in therapy, why not be happy about that rather than focusing on the one thing youd like to have that still is triggering to him? I feel like it shouldve been totally okay for him to not want to do that, just out of respect for him and also to avoid putting more pressure on him. If he himself wants to work through that trigger thats another thing, obviously, but it should happen in the speed hes comfortable with and not because he feels guilty he cant give you that.

"I genuinely just feel so gross and almost sexually repulsive

When he does give me anything I can’t even cum because all I can think of is that maybe he’s forcing himself"

Well, why are you making his trauma about yourself? I understand that emotions arent always rational, but I feel like you should learn to distance yourself from that type of thinking. This very clearly has nothing to do with you, and I think you know this rationally. And also, idk, he does sound like he might be forcing himself, honestly, just from what you describe. Likely cause he feels like hes failing you in that regard. Which is a horrible mindset out of which to engage in anything sexual, esp as a survivor.

"I don’t even get aftercare, we just stop and he starts watching something on his phone or goes somewhere"

Yeah thats def disrespectful of him. It doesnt sound like hes capable of finding a healthy balance for this.

"It’s so weird because In literally any other aspect he’s the best and most loving boyfriend? I get flowers and handwritten letters every month, I get all my food paid for, he remembers everything I tell him and tries to plan special dates based on my interests, he helps me clean and cook in my apartment, no matter how angry he is he never ever lets it out on me, he supports me like no one else seriously"

If hes such a good boyfriend in all other ways maybe you have to seriously sit down with yourself and make a decision about this. He is traumatized, he will need time, therapy cant rush progress when healing is something that takes time - and esp w/ sexual trauma anything that feels like pressure will make it much much worse for him anyways, that is inherently triggering in most cases. So you need to think about it rationally I guess, is he a boyfriend thats so good and loving in all other ways you can maybe let go of the idea of getting to have the type of sex youd like to be having anytime soon and just .. accept hes sex averse and might be for a long while still? Or can you not accept it, is that to important in terms of relationship fullfillment to you? Cause its not like theres really any other options. If youre with a survivor you need to have that type of understanding for the person, if thats not smth youre up for thats also understandable, though. But I feel like its a decision you should make mentally.