Do you sometimes wonder why you don't cry in situations in which you were supposed to cry or get sad? Can somebody help me?

My girlfriend is my neighbour, but her college is far away. So we meet only once in 3-4 months during her holidays. I used to get really sad and cry when she go back to college after holidays..

Today she went back and i was not as sad as I used to be. I don't know why. I have a lot of office work pending and the climate is too hot and irritating here, Don't know if it's because of all that..

Yes, my heart was feeling heavy and mood was off, so to get relief I recalled our memories and cried purposefully. When crying, I used to feel how much I love her. But what happened now?

Can somebody help?
Do you sometimes wonder why you don't cry in situations in which you were supposed to cry or get sad? Can somebody help me?
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