To ask for help with toddler sleeping

[Jaboody]

I will try to include everything so as not to drip feed.
DS is 2 and a half and has his own bedroom and now converted cot to a proper bed as he could climb out of it. There is a stair gate in his doorway.
He goes to sleep on his own relatively well, however will wake in the night and refuse to go back to bed and want to come into our bed. Eventually we give in and he will fall asleep in our bed. How do we stop this?
We have been laying on the floor with him in his room. I have bought an airbed this morning as its probably better than the floor.

Should we continue sleeping in his room or let him scream it out and every so often reassure thay we are nearby from our bed?
Sorry I'm a first time mum and would like to have another baby soon before I'm 40.

Eventually we give in and he will fall asleep in our bed.

that’s the problem but you already know it.

the answer is to put him back to bed every time. Accept that for a week it’ll be a bit painful but after that it’ll be better as long as you don’t put them back in your bed.

Minimal talking. No lights on. Night lights only. “You need to go back to bed now, it’s nighttime”

talk in the day about how your bed is your bed, his is his and that everybody needs sleep to have fun and not get poorly. It’s not kind to wake people up at night for no reason. But most importantly just be stubborn and don’t let them in.

Thank you all for your helpful replies 😊
I have set up and airbed in DS room. He seems to want to sleep on that so perhaps he may just want a better mattress instead of the cot bed one.