Baby who won't sleep unless on my chest

Amber • 20 years old, mumma to my beautiful boy Oliver and expecting my second in Jan 2018 👶🏼
First time mum and I love to cuddle my new bub and since my partner rarely sleeps in bed with me I always find myself sleeping with Bub with me in bed, it's become a habit for both me and him and now when I do try to put him to bed in his bassinet he always wakes himself up and cries! Only way I can settle him and make him go to sleep is by putting him on my chest and instantly he'll be asleep. Does anyone have any tips on how I can try break this habit? I really find it hard listening to him cry :(