awakendabeast

Oh, Oh!  I see a red flag.  You have been helping her financially, I am assuming it was voluntary on your part.  Now the amount you are being asked to send is increasing.  I met my fiancé online, however I decided to visit & stay for a little over one month.  I observed everything.  It took me an additional 1 year of communicating back & forth before I decided to file for K1.  I am not judging.  When it comes to matters of the heart, we can get blinded by the moment.  My friend, please take your time & I know that you will make the right decision for yourself.

Please slow things down and take more time to ponder this.  Marriage is tough, and divorce is hell.  Toss immigration stuff into it... nightmare.  I agree w/the pp's - talk about maybe living in Cuba or just not the US and see her reaction.  The money is a potential red flag, especially if you're sending it regularly now.  
 
Something in your gut has raised these doubts.  Listen to your gut and give this relationship more time before looking into marriage and immigration.  (Just my opinion.)

I met her 1 year ago and we started emailing each other everyday then calling on the phone but that can get expensive and so we started free video chat on IMO about once a week. I started sending her money for this or that and now what i thought was just to help is now like a little rent each month. I dont mind because i care for her. I visited her twice this year once for 7 days and the second time for 11 days. I have only met her aunt because she lives on the outskirts of Holguin. I was initially really ready to get married but lately i thought what if the only reason she speaks to me is for that little rent i give her? Because there is money involved validity of my relationship might be completely false. My plan was to hold off a bit and go stay in cuba for 1 month in her home town see if her family embraces me and see if there is no boyfriend anywhere in the shadows. This is cuba and it has a really bad rap as to people scamming and that couples encourage each other to scam tourist. It feels real to me. 

Like another poster suggested, you can suggest moving to Cuba instead.  If she says OMG NO or balks at the idea of both of you happily settling down in Cuba you may have your answer.