Re: I have the man, the ring, but no proposal!
You say you did your best not to pressure him..I hate to think what you'd be like if you were *trying* to pressure him. You pressured him to buy a ring, you pressured him to get your parents blessing, you're always telling him you want him to do it, you don't care when, where, or how.
Maybe the when, where, or how is a little more important to him. Perhaps he's like me, and a lot of other people, and plans to only get married once (or one more time, if that's the case). And if he only plans to marry once, he probably wants everything to be as special and romantic and wonderful as possible, since he'll never get another chance to try. And maybe he wants you to have the most special, romantic, and wonderful proposal as possible, since you'll never get another one, and he loves you, and he knows that if you weren't so desperate, that would matter to you, too.
I get that whole "I'm in love and I want to move forward" thing; I really do. I love my boyfriend to death, and yes, I want to marry him and all that, too. But I want him to ask me because HE wants to, because HE loves me that much, because HE wants to spend the rest of his life with me. I don't want him to ask me because I pressured him to, because I gave him an ultimatum, because I told him it would be a good idea or it was time or anything else like that. We've talked about our wedding, too. We talk about our future as a foregone conclusion, so the assumption is there that we *will* get married one day. That is security enough for me until he's ready to ask me. If he suddenly stops thinking of the future as a given, or if I reach a point where we've been together 10 years or something, then I may ask him if he plans to ask him, but I would never pressure him.
You need to back off. Admit to him that you've been pressuring him, and trying to manipulate him into asking you, and say you're sorry. Then leave it alone. Don't bring it up. At all. Let it go. Once the pressure is off, he'll begin thinking about it on his own. Then, he'll propose when he's ready.
And if you need more persuasion, consider this...you continue to pressure, badger, and manipulate him until he finally admits defeat and asks you to marry him. You say yes, you get married. And then, in every fight you have for the rest of your life, at some point, he throws out, "I only married you because you forced me!" or "I wish I'd never proposed!". Yes, he could say it anyway, but if you pressure him, then when he says it, you'll be plagued with doubts that it might actually be true. Do you really want that?