In Ukraine, even number of flowers is reserved for funerals; yellow flowers signify the end of something.
This will mean that you don't have feelings for her anymore or you want to end the relationship.
Try as much as you can to learn Ukrainian language and help her to learn yours.
If she does not make any effort to learn your language, it most likely means she does not take your relationship serious.
Table manners: When you're at dinner with a Ukrainian woman, she will expect you to do the pouring.
Be checking her glass from time to time and fill it if it's below half full.
Greetings: It is considered bad luck to shake hands across the threshold of a door.
Keep your conversations interesting by adding a little humor.
Take things slow and don't rush in asking her to marry you.
It's common in Ukraine that the man pays for the bill when a couple eats out.
Don't drink too much alcohol: Alcoholism is quite a problem for a lot of Ukrainian men.