Your right mages, he does need to find out the truth.
The way he reacted was a bit reckless but understandable.
When we hurt ourselves (physically), our immediate reaction to the pain is to say 'aw' and then assess the extent of the injury....not the other way around.
When Yug found out that Vrinda's dad had killed his father, his immediate reaction was to break off things with her because he believes that they have no future.....once, he's recovered from the shock ....he may try to find out more about his dad's death....
Either way, the fact that Vrinda's dad killed his isn't going to change. I don't know how the show creatives can spin the situation and make Vrinda's dad a victim in this....he didn't even show remorse....but then, stranger things have happened on t.v.
I realize that Vrinda's going through lots of pain....I really feel for her. But, so is Yug. I mean this was the guy that willingly came into her family, tried to win her despite her numerous rejections and setdowns, lied to his family....all for her. Yet, there are things in life that love can't overcome.
If Vrinda can stop herself from falling in love with a guy unless her family accepts him, why is it so hard for us to accept that Yug can also leave his love for his family? Is he not allowed to love his family just as much as Vrinda does?
Suppose Yug had not been able to win Vrinda's family, would she have run away with him? Probably not. She has to much honor and love invested in her family. So, why not Yug?