First of all I love Ukraine! It sounds like your in russia, or a neighbouring country but I have a good understanding of what Ukraine girls are like as Ive been there and met a ton of them. Don't blame yourself for asking if she has a bf, she would have told you at some point in escalation anyway so it doesn't matter. Ukrainian girls are very friendly but generally do not sleep around.
When you made out she was more dominating than you and tested you sayng your kiss wasnt good. Why she kissed you? My guess is she trusts you alot, hadnt had action for a while being away from her bf and is physically attracted to you, (also she may be jealous

). Based on what you wrote you need more experience to get this girl. If you want more help PM me your questions I would like to help you get this girl.