Pretty much, Belarus like S.U., however it is not like how she likes Russia, she is much more suddle about it and is a bit shy around him, something no many people not would expect from her, the reason for this is, she is just not as used to being around him as she is with Russia, in fact S.U. is the reason Belarus likes Russia.  When S.U. was taken away from Belarus, Russia, and Ukraine, she had feelings for him (as in like a little kid liking a grown up sorta way) and with S.U. gone she turned to the only other male in her life, Russia.  S.U. likes her but not in a romanic way, he sees her more as a close friend (friendzoned :/) rather than a girlfriend or lover... Except of course, when he is drunk and heart-broken.