i give up. I dont see why its bothering me.
The first letter if every sentence is supposed to be capitalized.
Its is an acronym for It is, so therefore it should be it's. Not its. This also applies to dont, it stands for do not.
After the end of every sentence make a space if you are about to start a new sentence.
Your sentence fixed:
I give up. I don't see why it's bothering me.