Help (bj advice)

Bee 🐝

So I have a small mouth and I try giving my bf BJ's and he loves them but he gets very flustered and sorta pushes my head down cause he wants to go deeper and I remind him to not do that and he apologises he's super sweet and doesn't so it again for a while but I really wanna give him a deep one but how? I do the yawn technique , heaps of saliva , even curling the toes to take my focus away but it's just not deep enough please help 💖💖

Also before anyone says anything he's very sweet and caring it's just a reflex like grabbing hair etc during sex , he's great dw 💖💖💖💖