Sleep separate. We are on baby #2 and #1 slept in our bed for almost 12 mos. It was terrible as the baby got bigger an would move around. No one got sleep. Sleep deprivation is bad for parenting and marriages. If you knew your child's school bus driver was operating on 3-4 hours sleep you'd pitch a fit, why should parents do the same?
#2 is sleeping in her room in crib and we have a twin bed in that room and we take turns sleeping in that room with her. She starting to stay asleep at night for longer periods and is almost 6 mos old. She also has terrible reflux since she was born and would vomit up even breastmilk so she is on a special formula.