putting baby to sleep

Sara
For the last few weeks we have been co sleeping with our son (6wks now), but with the heat and the dog on the bed I'm having a really hard time sleeping. My son sleeps pretty much through the night and I want to enjoy it. So I just let him lay in bed with me until he fell asleep then I moved him to the pack play which is set up in our room. He is still sleeping, but now I'm nervous about not having him next to me. I know it's silly but how do I get past this!  I'm writing this just to keep me from picking him up and putting back in our bed! Any words of advice?!