14mo baby sleeping problems

Hi everyone,First of all, I want to apologize for my english because it's not my native language, so sorry if my expressions are not correct. We have a 14 months boy (only child now, another coming in March) that has never been a good sleeper. He's a healthy boy, very happy since he was born and very active, 0 problems with food (he loves eating and we did baby lead weaning since 5 months). Since he was born he always got up at least two three times per night, bad nights can be 5 to 7 times and good nights maybe one (in these 14 months, he slept trhough all the night maybe two or three times). Up until September, it went by phases, maybe we had 2 to 4 good nights and maybe another 3 to 5 bad nights. Until September he didn't go to day care, we had a person who cared for him during the day.He started kindergarten this September and he behaves very good, he eats well, plays and we leave hem there every morning with no tears. He event started having better naps schedules, because before kindergarten he usually slept just 30 to 60 minuts in the morning (around 11 am) and another 30 to 45 minutes tops in the afternoon (3 or 4 pm maybe). Now in kindergarten he naps 1h30m to 2h after lunch (12.30pm) and just one nap in all day. We usually bath him at 8.00pm and dinner 8.30pm, and then to bed around 9 or 9.30 (depends on how active he is) [please note that I'm from Spain, here normal bed time for adults is no less than 23.00 and dinner time is usually never 21.30].He sleeps in his own room and we nurse him to sleep, usually telling him a tale or singing. Going to sleep has improved, in the past he just went to sleep in his mother's arms, and now it depends on the night but we can get him to sleep by his own in his crib. The problem is the wake ups during the night, he usually get up on his knees and cries until you go comfort him. Good nights are the ones when he wakes up 3 times and you just go, give him again the pacifier (or a little bit of water), he lies back again and he sleeps, so these are short wake ups. But for example last night he was awake since 3 to 5 am crying relentlessly at the top of his lungs with just short periods of 5 minutes sleep. He was crying, we comforted him (me or his mother), he went back to the crib and to sleep, it seemed like he was asleep again and then, without any particular reason, he just wakes up and starts crying. We try to avoid getting him in our bed, we've done it sometimes but usually does not help a lot, he just start moving and crying between us until he gets a good position to sleep (no less than 20 to 30 minutes, and sometimes it seems like he's breakdancing!). We've never tried CIO not for us, because I feel bad about our neighbours (and his lungs are really powerful).Nights like these makes me angry and I feel awful because I resent him, it's like I hate him and love him at the same time. I had the impulse last night of going away from home (for a short ride, not forever) because I couldn't stand it any more, but I didn't because I think it was not fair to my wife. These nights are also getting in our relation, we were a happy couple and now I feel like we are just his caregivers, not a couple any more (no dates, no plans, no sex, no nothing).Is there something we are missing or that we could do? Or, like we think, it's just something we have to "stand" until it starts improving? We are so scared because we'll have another baby in March and we thought that by this date he would be sleeping better, but it seems that nights are getting worse instead of better.Thanks in advance and sorry for the long post.... via /r/Parenting http://ift.tt/2dlmdIq