L.P.
I can totally relate. My son, at 18 months, was still waking several times a night for bottles. I didn't have the boob attachment problem (he self weaned at 7 months), but I was terribly sleep deprived. I had given up on trying to have him sleep in his crib, because he just didn't sleep. We just naturally moved to co-sleeping, and that was the ONLY way I got any sleep whatsoever. And just before age 2, my son miraculously stopped all the night time waking. That's not to say he never night wakes, but not 4 and 5 times a night.
I guess I don't really have any suggestions except to try the co-sleeping and see if he eventually sleeps better with less waking if he can sense you next to him. And hopefully, that way, he'll grow more secure in his sleep habits, and be more able to sleep and stay asleep.
Best wishes... I've been where you are.