just need some of that appreciation

Have you ever feel like you're working for nothing. It feels like no one is appreciating  your role in the work group. Your effort all this while are worthless. Then, you'll start to feel stressed out. Like no body could help you to finish the work. It feels like 'teamwork' is no longer exist in the organization. 

How do you feel, if suddenly your dream holiday that you've planned for a long time (in my case, i really need to go back to my hometown, I'm really homesick now), have to be cancelled, because of some inconsiderate people who just think about work, and don't care anything about what happened to their staff. It does feel sad.

In a sudden, you're demotivated, you feel like you need to look for a new job, you feel like nobody understand you (except for your family, cause they are not involved in this case), you feel like you're just a shadow, you're there when they're hot and sitting under the sun, but you disappear when it's raining.

I'm still thinking, what should i do, to be motivated, to be happy at work again, like before...