Why would my parrot cling to me ?

Last month he was at deaths door , and due to me has made a full recovery . Ever since then he is very attached / clingy towards me , when he is out his cage he always stays beside me if i go upstair he stays on my shoulder ( this is something he never did before , he always freaked out) Could he have built a bigger bond with me cause i am the one who helped him recover and helped him when he was near death . ?

I am not sure what was wrong with him , he lost weight wouldn’t perch he didn’t have the weight/ strenght to fly . But is now near perfect weight and perching and flying again .