Hiya, my little boy was the same, slept quite well at night but would not have naps in the day, unless we were in the car, or he was being cuddled, and then only for 30mins. Would sleep fine snuggled on my chest but as soon as i'd try to sneak him into his cot he woke up!
Now he has 2 naps a day and lovely long nights! He's probably just sorting himself out. We never really did a routine as such, just went with the flow, fed on demand. The only thing i insisted upon was that if he woke up before 6am it was feed and back to bed, as i didn't want him to get into early waking habits! 
I know it's tiring, we did go through a 2 month phase of 2 hourly wakings every night - nightmare, but moving him into his own room sorted that out. It will get better, but bear in mind that he'll sleep when he needs to. Some babies just don't nap in the day, and that's fine for the,, even though it doesn't help exhausted parents!
Good luck! xxx