But what if your tempo is just right and the music still sounds boring? There are 2 things you can do here:
1. Shorten the weak beats of the measure.
2. Start counting the beats out loud.
When you shorten the last beat of the measure, it naturally connects with the next measure and the music begins to flow (even in the slow tempo).
When you count the beats out loud, you are aware of the meter and pulse - very important components of the piece which you should never forget.
I know, it's exceedingly difficult to count out loud while performing but stick with it for a while and this trick will help the music come alive.