Puppy help with a 2 and half month pup!?

I had the same problem with my puppy and he will do it for the first week so it's good to leave him in there, mine only lasted about 4 days. Also when you go out to uni leave him a dental stick and he will be fine. Also if you get him a doggy bed beside your bed he will be fine if you tell him to go in that at night.