Losing an animal of ours it's really frustating, I know it because my dog died 3 months ago, and even today I feel like he has died yesterday.
Our pets are our life, we make them feel comfortable among those who are taking care of him and the advantage (sometimes disavantage) of that is that we will love them so much as we loved/love our first love.
Well, let's get to the point. We can't get over our pet's death, it's just impossible, well, not that I'm asking you to come back in time and make yourself never bought that pet, in my case and if that was possible, I wouldn't never make that, I really did loved my dog and I'm always going to love him, I will never regreat having him.
But there are a few tips, like, beign with your family, friends and those who you really care about, they will understand your situation and make you fill as most comfortable as they want. Another tip is to get another pet, not a thing that is always easy, but if you start to love another one, the pain you feel will start to low down. Another is to move foward. Create a new life, get a new job, make new friends, meet better and more active people, just make a radical changing in your life.
All this made me in 3 months start to make my pain go away. But keep in mind that you will never, I repeat, NEVER forget your so beloved pet.
Good luck, you'll need it !