It's time to take the next step. Close out this series, score early, dominate, get the crowd behind you, frustrate the B's and give yourself a few days off and get ready for Columbus.
I've seen some very good Leaf teams play too game 7's and even when they win, they eventually run out of gas.
1993 when they went to the max 21 games in three series before losing back to back heartbreakers to the Kings, one game away from the Cup finals.
2001 when they ran out of steam vs. Carolina after back to back (very) physical 7 game series.
I think both teams could have done themselves some favours by closing out the other series even just one game sooner. 2 Days of extra rest is invaluable before another round, especially when you play a physical brand of hockey.
Bottom line, finish it off and rest up. If you cannot get up for a closing game at home knowing a loss puts you back on a plane to play in front of another hostile crowd, you aren't going to get far...ever. This Bruins team isn't going to roll over, so put them out of their misery.
Dominate tomorrow or roll a loaded dice. As a bonus, since Leafs will have home ice the rest of the way through if they win, they don't even need to leave their homes after they win!