Dear Jean-Marie
You can have a relationship without marriage with a woman from your country or other countries in the Euro Union. What's stopping you?(look at local dating sites ) For other women need a visa for that would be legally with you or you are ready to change your country of residence? If you are satisfied with the relationship at a distance and sometimes meet..
I do not think that you will find a lot of women are willing and ready .In general, Slavic women have another upbringing and the concept of the relationship with a man and want to real the traditional family.
although,, who seeks will always find
good luck to you 😊