helpppp

I have an 1year 10 month old who will not stop hitting, headbutting, kicking and climbing all over me constantly, like if i try and sit down for a minute he’s on me straight away doing one of these things and i’ve tried ignoring it, a firm no, time outs, walking away, distractions but nothing seems to work!! I’m really exhausted as my partner works 12 hour shifts and although we go out and about every day i feel very lonely and almost like i’m raising him alone half the time:( my partner also tells my it’s just a phase but it’s been months now and he’s still not over it so any advice would be so much appreciated 🫶🏻