She came to my office since last October.

She came to my office since last October.

I was disappointed about that she doesn’t didn't like me.

I don’t assent it, because I didn’t anything to her. (I don't really understand this sentence. Do you mean "I don't understand it, because I didn't do anything to her," or maybe "It's not surprising, because I didn't say anything to her"?)

I also taught to told her my mind it is that I love you her. (Or "I also told her 'I love you.' ")

She came to my office since last October.

I didn’t think anything to of her at the early time.

She is also attractive. (This is almost the same as the previous sentence, and isn't really necessary. Cute usually implies attractive.)

I would like to date her, someday, somewhere.

If I can could get married with marry her (or "get married to her"), I will let her to big luck would feel very lucky.

I don’t assent can't believe it, because I didn’t do anything to her. [editor note: to use the word "assent" is difficult. I would suggest "I couldn't assent to it" as a proper use. But this is not a commonly used word, so not everyone would know what it means. Assent means same as "Accept" or "Agree with"]

I also taught to let her know what's in my mind, it is 'I love you'.

But recently, I think that she is so cute recently.

She is also attractive. [editor note: people can still be cute with out being attractive. It is to say that you want to be close with her that she has attraction for you.]