Well you know all about selling but it seams pretty clear that you already have some problems with women.
You have a great inner game but you should tune it to perfection.
You shouldn't go to women thinking: They already want me, cuz they might don't, that's what happen when you knock on a door and you receive a NO before you even say anything, this is because people don't want to buy you anything, they already know that your products are expensive, low quality, no warranty, no support, etc. door selling is the worse service a person can get (only my opinion, but is not this what we are talking about).
And what women thing when a man approaches them is: He only wants to fuck me and dump me after because he got what he wanted, i don't want a person like him! Or: I'm not interested on him cuz he don't have what i want\need.
So what you do when you are selling door to door? You try to make the other persons thinking that you are not there to sell them anything, so you don't start your conversations with: I'm here to sell you this awesome alarm, no! You start with something like: Hello my friend, are you having a nice day? I'm here to demonstrate you this product (see you didn't say: I'm here to sell you this), bla bla bla...
What i mean is, when you approach a woman, all you want to make sure is that: I hope she doesn't think I'm interested on fucking her to close the business, I'm just here to socialize because i'm a sociable person. (see it's a different and positive perspective, which you do in your sales).
And after your selling demonstration, what you do? You start to talking about prices right? But you don't say: "Ok enough of bullshit, this going to cost you 5000$, pay now!" What you do? You escalate and you make sure that the other person is comfortable with what you are saying.
So in other words: You have to at some point with a woman, make her realize that you really want to close business with her (kiss her, fuck her whatever), so you escalate until you achieve what you want.
In short: You don't go to a woman showing interest, you go with no weapons and as a sociable person, after awhile you demonstrate what you are (your product) and then you should start to do your inner game (thinking that they already want you) and after that you escalate to close the business.
This is why PUA's use to say that you shouldn't show interest at the beginning because don't showing interest creates comfort on women. But you can go there and show interest, it's up to you, but it doesn't work that well.
About you losing your self in the interaction, well, it's because don't even you believe in the bullshit you tell them, this is because you know that you are not like that

Don't say bullshit, if you don't have an interesting life then try to have one, then your stories become true. Also avoid to become cocky, people hate cocky persons, they are just despicable..