I have one that sounds like yours! He is 16 months and not walking yet but does walk with things (push toys, holding onto things) now that he's been at daycare for a couple months. He is normally a good child and mom is great. However, I get the feeling he is a bit babied at home. He doesn't make an effort to walk without the aide of something, he scream cries if he can't see me, he is miserable if he doesn't get his morning nap or is hungry and cries like crazy until he's fed. He prefers to be held and I have been carrying him up and down the stairs because with 3 kids who can run up them, they just don't have the patience to wait for him while he crawls up them.

I don't have much advice sorry lol but I will be watching this thread. My saving grace has been that my other kids are walkers and pretty independent! They are all content to free play which frees me up to deal with him when need be. I alternate between tough love and letting him cry and picking him up. I'm like you and hoping this stage is outgrown soon!