
You can't use "Therefore I conclude" in a sentence. That's unacceptable. You can say "Therefore" or "I conclude" instead. (e.g. "So therefore, you got to be good in bed so he'll love you back" or "So I conclude, you got to be good in bed so he'll love you back")
P.S: Im not trying to be a smart-ass it's just that it is making me uncomfortable

I've got to disagree. English is efficient and precise. It's just that most people don't study it well enough. They abuse the language and claim that it's flexible, even messy. That's not true. Rules govern almost everything. You just need to know them. Most people don't need to tediously study grammar as much as they need to study usage. For that it's best, I think, to make mistakes and let someone correct you - as Jess just did.

a minute ago you declared that anything goes. Now you want rules. LOL You can probably trust Jess's advice.
Language doesn't evolve anywhere near as fast as some would have us all believe. If you're a world class novelist, you can change the language. The rest of us down here on the ground ought to pay attention to how we use the language, not how we change it.
Oh, and the answer to your question is yes, there are rules that confirm that it's incorrect.

You can probably get away with it. I doubt that anyone will call you down on it. Instead of either word, you could also simply say, "so." "so you've got to be..." "Therefore I conclude" borders on high style prose, which you usually don't want, but I like the sound of "therefore I conclude" because it sounds fancy and contrasts with "you gotta be." Nicely styled.
i conclude... you got to be good in bed so he'll love you back...