My last day

It was my last day at work yesterday. A place where I have spent the past 5 years. Thought I would be happy. In fact I thought I would be really happy. But it wasnt to be the case. Reminds me of my exams during university. Every year without fail I will always be looking fwd to the last day where I can burn all my notes, go out partying. But again without fail, I will usually feel kinda lost after the last paper. Am I missing my old workplace already?