Torah teaches us that even when we are in aveilus for our PARENTS for a full year, there is a limit to the aveilus. There is a Shiva period; there is a Shloshim period, followed by 10 more months of saying Kaddish, and then the final month of aveilus for them. For non-parental losses, the halachic period ends with the Shloshim. Of course the feelings of aveilus don’t go away so easily, but we are forced back into life. If we cannot cope, we need help.
This post sounds like it was written for effect. If not, if the poster genuinely has these feelings, I urge him/her to seek immediate counseling, with a Rov or another professonal, to help deal with an inappropriate emotional response.
We can mourn the Beis Hamikdash for over 2,000 years. We are not supposed to be in mourning yomam valeila for people, and certainly not ewverytime we hear of another death, which unfortunately is not ceasing any time soon. There is a hge difference between feeling very sad at hearing of someone else’s pain (and none of us comes even close to Moshe Rabbeinu, so I doubt we are near that madreiga of his empathy), and being in actual aveilus for the death of a Yid whom we do not know.