Well in the last episode Veronica is dating Piz and they don't break up. However after Logan defends Veronica and beats the guy who leaked her sex tape with Piz, Veronica and Logan share a moment, where they both smile indicating that Veronica is happy with what Logan did and might want to get back together with him. I'm still hoping...
Well , it's confused :)
I guess that we all can imagine our own ending :)
For those who loves Piz/Veronica we can imagine that Veronica is happy with him (she doesn't break up with him at the end) and with Logan is totally over and they 'll stay good friend !
Now , for those who loves Logan/Veronica : we can imagine that Veronica'll break up with Piz 'cause she realised that Logan and her are meant to be together (after the look at the end ♥) !
Now , be free to imagine what you want ! For my part , i want her to end up with Logan and for me they did (end up together) :)