Pastrnak is a pending UFA next summer and the Bruins GM is doing everything to avoid seeing what happened to the Calgary Flames with Johnny Gaudreau, happen to Boston. However Pastrnak doesn't seem too eager to re-sign with Boston.
According to Andy & Rono of ARSports, Pastrnak is in no rush to considering re-signing with the Bruins. Pasta's only consideration at this time is winning a Stanley Cup, something he's unsure the Bruins can accomplish.
While there is no guarantee that Pastrnak is leaving the Bruins, there is also no guarantee he is staying either. All we know right now is, he has no interest in even discussing an extension.