You do not have family or friends who understand. Your grief is real.  Where are your friends when you need them.. No one seems to understand. Do they really think you are making up how you feel?

If you need help, ask your veterinarian or humane association to recommend a pet loss counselor or support group. Check with your church or hospital for grief counseling. Remember, your grief is genuine and deserving of support.

 
When a pet dies, you must choose how to handle its remains. Sometimes, in the midst of grief, it may seem easiest to leave the pet at the clinic for disposal. Check with your clinic to find out whether there is a fee for such disposal. Some shelters also accept such remains, though many charge a fee for disposal.
If you prefer a more formal option, several are available.

Home burial is a popular choice, if you have sufficient property for it. It is economical and enables you to design your own funeral ceremony at little cost. However, city regulations usually prohibit pet burials, and this is not a good choice for renters or people who move frequently. To many, a pet cemetery provides a sense of dignity, security, and permanence. Owners appreciate the serene surroundings and care of the grave-site.
Cemetery costs vary depending on the services you select. Cremation is a less expensive option that allows you to handle your pet's remains in a variety of ways: bury them (even in the city), scatter them in a favorite location, place them in a Columbarium, or even keep them with you in a decorative urn (of which a wide variety are available).
Check with your veterinarian, pet shop, or phone directory for options available in your area. Consider your living situation, personal and religious values, finances, and future plans when making your decision. It's also wise to make such plans in advance, rather than hurriedly in the midst of grief.
It can get so complicated! What should I tell my children? You are the best judge of how much information your children can handle about death and the loss of their pet. Don't underestimate them, however. You may find that, by being honest with them about your pet's loss, you may be able to address some fears and misperceptions they have about death. Make sure your children understand the difference between death and ordinary sleep. Never say the pet "went away," or your child may wonder what he or she did to make it leave, and wait in anguish for its return. That also makes it harder for a child to accept a new pet. Make it clear that the pet will not come back, but that it is happy and free of pain.
Never assume a child is too young or too old to grieve. Never criticize a child for tears, or tell them to "be strong" or not to feel sad. Be honest about your own sorrow; don't try to hide it, or children may feel required to hide their grief as well. Discuss the issue with the entire family, and give everyone a chance to work through their grief at their own pace.

My girls they were so close How will Morgan handle that Della is not coming back!!

Morgan will  observe every change in your household, She is going to notice the absence of a Della. Pets often form strong attachments to one another, and the survivor of such a pair may seem to grieve for its companion. You may need to give your surviving pets a lot of extra attention and love to help them through this period. The love of your surviving pets can be wonderfully healing for your own grief.
I have heard that if I get another Boston for Morgan and the kids it will make the a pain go away faster.
If your emotions are still in turmoil, you may resent a new dog  for trying to "take the place" of the old-for what you really want is your old pet back. You many not realize this until you bring in a new dog.  Children in particular may feel that loving a new pet is "disloyal" to the previous pet. But if you do get a new dog most people highly recommend that you, avoid getting a "look-a-like" pet, which makes comparisons all the more likely. Don't expect your new pet to be "just like" the one you lost, but allow it to develop its own personality.
Something else to remember is never give a new dog the same name or nickname as the old.

When you are ready, select an animal with whom you can build another long, loving relationship-because this is what having a pet is all about!
It is suggested that you should allow yourself enough time to grieve properly.

It make take more time to get over the loss of some pets, such as dogs and cats, since form many people, they may have been an important part of the family for years.

Just remember; It is very natural to feel sad and that you should not feel ashamed for grieving your loss. Everyone grieves for different amounts of time.