I can't give any input on the visas, but you said you will visit her again... That will be a good time to produce a lot of evidence (photos, receipts, etc) for the K1 should you decide to go that route. Then you can stay with her while it's being processed.
Like others have said, however, give it time. There is more than a language barrier - you two likely have very different expectations of a romantic partner and different worldviews. No matter how fluent you are in the language, it is difficult for both partners to be satisfied if culturally ingrained expectations aren't filled.
I'm speaking from experience.
That being said, my husband and I were using dictionaries even early on in our marriage and I ended up staying in his country after only knowing him about three months, so I get your situation! But I wouldn't recommend jumping into a relationship with a foreigner in this way - it has been at times really rough for us!
Aleks&Hajji got a reaction from rutabaga in Met a woman, but 90 days isn't enough