Re: You're sure to..
You are sure to ... = It is certain that you will ...
It is the infinitive, rather than the present tense that refers to future happening, as it so often does -
I hope/want/expect/am eager/etc to see you next week.
Like the 'being sure', the 'hoping, wanting expecting, being eager' denote present feelings about a future 'seeing'.
Note that in I will see you and I am going to see you, the underlined forms are present tense forms. As we have no future tense as such in English, futurity can only be expressed with present tense (and occasionally past tense) forms.
Please do not edit your question after it has received a response. Such editing can make the response hard for others to understand.