We have been going through the same thing!! Our son will be 1 on Nov. 1st, but the last week or two, he's been waking up in the middle of the night again, crying out to us! He never really slept through the night, but he is breastfed, so it was okay. He would go down at 8, wake up at 2am, be fed, then again around 5ish. The last couple of months, he would go to bed at 8, then sleep right through until 7:30am!! At first he would wake up complaining, then he would wake up and just entertain himself. We were so happy! Now it's like he's reverted! I have heard this happens because their sleep cycle changes around one. I need to read more about it. They're more active and always feel like they will be missing something if they go to sleep. But then they get over-tired, which is another issue! This past Sunday, he woke up 2hrs after he went down with his first "night terror" (different from nightmare)! I almost passed out, that was scary! Sounds like your son just wants to be with you guys...I mean, we sleep with our spouses and they're in the next room all alone! I would want to be with my parents too!
Another thing, I think what we're doing wrong is when they cry out, we bring them in our room in our bed instead of putting them back to sleep in their own crib. But to be honest, at 2am, I am interested in getting him back to sleep, however it's done and the easiest way! Sounds bad, but when you have to get up for work in the morning...
My son falls asleep while being breastfed. When he was about 4mths, we were able to just put him in his crib and he would fall asleep. I think ever since he's become more active, that doesn't happen anymore.