The only one being able to answer that question is you. Maybe there are reasons in your life why you feel like so. Maybe there are none.
But I can tell you, that suffering means sharing in the lord's sacrificial love. Either by repairing for your own sins you are being lifted closer to heaven, or you might even be atoning for other people's sins. In any case it's a purification. So don't feel down about feeling down :yum:. Start trusting, that He is guiding you closer to Himself!
Merry Christmas :christmas_tree: