Leverkusen can actually mount more pressure on Bayern Munich if they win on Friday against Bochum there by reducing the points difference to 3 points untill after Bayern Munich game on Saturday. Bochum might actually not be an easy meat to chew because they actually surprised Bayern Munich just few weeks ago by defeating the 3 - 2, infact in the first leg, Leverkusen were not able to defeat them as they played a 1 - 1 draw in the first leg. Leverkusen needs to put up a better performance and kill off the game before Bochum could realise themselves.
In their first clash this season (1-1), Leverkusen had a bit of a dip in performance, they had a few games in a row that ended in draws. Plus, Bochum had a home advantage.
In the previous season, Bochum got demolished by Leverkusen twice: first 4-0 in the first half of the season and then 5-0.
So if we want to consider the most recent head to head results, Leverkusen is rightfully a clear favourite.
But let's not forget that Bayern has a much better goal difference than Leverkusen (currently +51 Vs +26) so, in practice, Leverkusen has to make up 7, not 6 points to win the league.