Your note indicates that you already know the answer to this. Of course he's going to want you to hold him - you've taught him very well. Stop deferring to him each time. Yes, he'll fuss, but it's OK.
my 14month old, now did this at your sons age. i remember wanting to lose my mind, but i am proud to say it was indeed a phase and we have been over it about a month now. just be patient. don't come running at every cry, but get there when you can and give comfort. it is a phase.