My DD had reflux and was exactly the same, every 2 hours day and night. During growth spurts it was every 45min-an hour.
By 6mo all my other friends had babies that slept through, I was still up 6,7,8 times a night. People kept telling me it would get better so I held on to that.
At 11m we are not down to 3 wakes on a bad night (my mummy friends gasp at that but if you're anything like I was this will seem like heaven, it is!) We cosleep and it sounds like you do too.
I resisted mt HV telling me to let her CIO at 7mo! I just kept telling myself it would get better because it had to, plus I kind of worked on accepting I had a baby that doesn't do sleep (she will also only nap in car/pram or if I feed her to sleep but she has to stay on my lap and sleeps for an hour max)
I totally understand how hard and horrid it is, and how ill you end up feeling. It will get better, not now, maybe not for months but it will at some point.
RE: sex issue, my DD will now sleep in our bed in the evening on her own (obs you can't do this yet with SIDS risk etc) it was a case of slowly moving further away from her in bed till she did an hour on her own, then straight downstairs for sex on the sofa! Needs must really!
Sorry, this has turned out very long