This is off the wall, but you may have the same sort of immune system he does. Instinctively humans like the smell of someone that smells different than they do because it's a subtle sign the immune system is different and your potential child will be healthier. You're being put off because you know you don't want kids with him! Have him try baking soda scrub, or white vinegar. Possible fungal infection gone wrong. He'll either smell clean or smell like a human sized bag of chips!

Plot twist: it’s OP’s nose that needs to see a doctor.

It could also be toilet hygiene - Maybe stinker doesn’t wipe?

There’s medication for that

This has got to be one of those times a girl finds a tampon shooved deep in her and it starts to smell incredibly horrid so go to the hospital so they can get that dumpster fire out of you

This has to be a medical condition. Boo-hoo poor you, you’d probably commit suicide if you had what she had from all the crap people talk

Get a wax warmer to see if that’ll at least help a little.

Buy a douche and throw it on her bed

Stop bathing so your stench will overwhelm hers and you won't be able to smell her anymore. Problem solved.

Either there's something wrong with your sense of smell, or something medically wrong with her.