Sad Day

I was in despair (so desparating/desperate) just now.

Further study in Germany was, and is, my dream, (is/was(it is still my dream for now, but i am talking about just now) my dream, and so it had became) the driving force for me to be more hardworking in order to get a good set of results. However, I am talking about now and my plans have just received a major setback / are in tatters/ have been dealt a huge blow. (However, it was/is all ruin/gone/( can't find a suitable verbs).

Yesterday was the first day of (for) school in 2014, but my friends were acting (/have/had became so)  strange towards (to) me.
Maybe they were feeling overstressed concerning (too stress about) the forthcoming (upcoming) examination.
Each students smile seemed to be more of a grimace. (They were a little bit fake.Fake smile.)

Don't despair, just work harder and you will meet your objective.

Sad day.

I am in despair just now.

Further study in Germany is my dream, and so it had became the driving force for me to be more hardworking in order to get a good results. However, there now seems to be quite a setback. [I agree with the previous correction, but with a couple of corrections.]

Yesterday was the first day of school in 2014, but my friends have became so strange to me. Maybe they were too stressed out about the upcoming examination. Maybe they were a little bit fake.

[I also agree with Frank here, again. Don't give up on your dream, and a new school term might bring different friends or people into your life who are good.]

Sad day

I was so desperate just now.

Further study in Germany is my dream, and so it had became the driving force for me to be more hardworking in order to get a good results.
However, it now seems receive quite a setback.

Yesterday was the first day for school in 2014, but my friends have became so strange to me.
Maybe they were too stressed about the upcoming examination.
They were a little bit fake. Fake smile.

[Good work.  You're dream seems quite within reach - current events of late seem to have upset you greatly.  I would suggest reserving judegment until a little more time has passed.]