What am I doing wrong?!

I'm getting desperate ... My baby boy is 16 months old and for the past few nights has been waking up during the night and not being able to get him to fall back asleep for 2 straight hours, after which he's apparently exhausted and falls to sleep. We do co-sleeping since he was 3 months old and I do breastfeed him. It has all been qorking quiet well for us up until recently, although has always been waking few time per night to breastfeed, apparentlh I got used to it. But now, he complains when he wakes up, doesn't settle with the breast, can't be calmed by caressing him or singing or whatever, clearly shows doesn't want to be touched. Only wants me to get up and walk with him around, doesn't cry but stays most of the time with his eyes wide open. Can't find a comfortable position in my hands either as he constantly wants to change position. Every time when I try to put him back to bed, he wakes up (if he's fallen asleep) and starts complain that he wants up. Doesn't even want to be walked only in the room, shows me with his hand the door that he wants in the hall. I literally don't know what am I doing wrong!!! I'm getting exhausted as on top, I'm his only carer during the day and night, so when not sleeping, I'm not a normal human being during the day either. It's getting to me. I don't know what to do ... What am I doing wrong?!? 🤕