Hi JT - you're not alone in feeling burned out from your workouts - its happened to me a couple of times. So if you need to take a break, then allow yourself a bit of time to regroup. Sometimes its not a physical limitation, but a mental one.
Maybe thinking about BM2 is hard for you because you know its a 90 minute workout, and its tough. Why not choose a different workout that you know you absolutely love to do - maybe because of the music, or certain moves. Or just do a pre-mix of BM2 that's shorter.
Or try something totally different, like spinning.
Or try making up a rotation for yourself that you feel excited about, choosing workouts that you know you really enjoy and have a big fun factor for you.
Anyways, these are just suggestions. Sometimes our brain needs a break along with our bodies. Don't feel guilty, just regroup then start again!