If Leverkusen can play their best performance in every match the way they have done so far, then they might be able to compete with Bayern Munich. Leverkusen will face Bochum in their next match and we can say for sure that Leverkusen will win easily in this match. And if they can collect three points by winning this match, then they will be able to get close to Bayern Munich in the points table. Moreover, since Bayern Munich is currently in the first position of the points table with 62 points, and Leverkusen has 56 points, there is only a six-point gap between the two teams at the moment. If Leverkusen wins the next match, there will be a 3-point gap, and there may be a more exciting fight in the Bundesliga from next week.
Bayern munich have just six points gap away from Leverkusen which means Leverkusen still have a chance at the league title race this season but this can only be achievable by their consistency in the remaining games. Certainly if they can maintain a winning streak for the remaining games it will mount plenty of pressure on Bayern Munich to slip up but if they fail to do so then Bayern Munich will continue to increase the gap from second place until the title is secured.
You are right, 6 points gap between Bayern Munich and Bayer Leverkusen is not enough to give Bayern Munich the league title infact Leverkusen still have a great chance to keep contending with Bayern Munich until the end of the league, Bayer Leverkusen will catch up with Bayern Munich if they win the remaining 8 matches in the league because from their number of matches played they have played 26 matches so far out of 34 matches if they win the remaining games and Bayern Munich fails to win some of their games they will have more chances of getting closer to them then it will be a great competition again since Bayern Munich will be playing the champions league and the league matches. But if Bayern Munich is able to win 7 matches out of the remaining 8 matches left, even though Leverkusen wins all the games they will still not get closer to them.