Not to discount your experience, but no drug really fits your description.
GHB is stimulating and makes you horny in low-ish doses then becomes more sedating and knocks you out in higher doses, but effects entirely disappear after ~3 hours, there are no aftereffects nor hangover and the GHB effect is really really obvious when it hits you and it hits you rather fast. It totally does not leave you conscious while paralyzed. GHB sleep is a real coma, one moment you are awake having fun like drunk but more intense, the next you drop down to the floor and will not wake up even when slapped or shouted at. When you wake up you will not be able to recall anything shortly before you fell asleep. You might feel tired before and sort of doze while high without losing consciousness, but this would require super-precise dosing that depends on your personal tolerance. GHB needs to be mixed in a strong tasting drink like orange juice or beer to go unnoticed. It cannot be smoked and the amount to put someone unconscious (3-6g) is too huge to somehow give covertly other than as described.
Poppers smell/taste extremely chemical like a solvent, they can easily lead to popped vessels, but they only act for a couple of minutes, the euphoria is not that huge, they don't make you unconscious and only might give you a headache (or stroke...) as an "aftereffect". Plus they cannot be covertly administered as they need to be inhaled from a larger vessel and the fluid must not be put directly into contact with the mouth.
Any combination of downers like benzos and stimulants like meth or MDMA would pretty much rather cancel than complement itself.
Ketamine can make you paralyzed while awake, I believe even while on stimulants though I have never tried it, but the experience is very surreal and psychedelic somewhat like smoking an insane amount of weed (like 10 bags) in one go but less difficult and you are much more stupified and memory is more impaired. You need to consume a huge dose of ketamine or it will not be like that and the effect can then rather easily be cosciously dismissed. The aftereffects can sort of feel like having a hangover from alcohol, but you would have to consume huge amounts repeatedly through the night to make them last until the next morning. Also it doesn't really have any effects on breathing or heart rate. I would say shallow breathing speaks more for opioids than for benzos, but opioids give more of a buzz and both don't really leave you braindead and they also mellow out stimulants.
There are a lot of ketamine-alike RCs like MXE or 4-MeO-PCP, just as with any other drug like synthetic cannabinoids, Ritalin and MDMA analogues, etc. Who knows what they all do.
Maybe you were given a wild combination of ketamine, stimulant then benzo RCs. But I would say it would be really really really obvious to you if you were, and it is not like someone could simply talk you out of it the next morning to shrug it off as if it was just strong weed or something. Those are hard drugs with very hard obvious effects and they either don't really work that way in low dosage or would rather mismatch how you described it.
Maybe your experience was rather mild however, so it really could be confused with weed? Then maybe it wasn't caused by any of those very obvious hard drugs, but the weed could just have been laced with synthetic cannabinoid RCs, which could as well have produced a 10x stronger effect than normal weed, if you smoked much more than he did, resulting in a Ketamin-ish effect. It also could explain why you had a weird euphoria, comedown and hangover from it.
Maybe try reading experience reports about cannabinoid RCs (also called spice) and see if that fits what you experienced. However there are a lot of cannabinoid RCs out there, you would have work through the entire list of them. Also most of the weird and nasty side-effects associated with them, are often thought to rather stem from botched up synthesis or impurities, making it even more difficult to get a clear picture.
I would say the most obvious first step would be to simply stop using weed before being intimate. Depending on how you would judge the overall situation, then to also (or immediately as well) stop having sex or to stop the relationship all together.