Thank you for your letter–and I hope God will use it to remind people to encourage and help families who are in your situation. You are carrying a heavy burden, and others need to help you bear it. The Bible tells us to "Carry each other's burdens, and in this way you will fulfill the law of Christ (i.e., His command to love)" (Galatians 6:2).
The most important thing I can tell you is that even if others don't seem to care, God does care about you and your situation. He knows the struggles and the loneliness you face, and He knows also the heartaches and even the embarrassment you may feel. More than that, He loves you and wants to help you and give you hope. The Bible says, "Praise be to the Lord, to God our Savior, who daily bears our burdens" (Psalm 68:19). Open your heart to Christ and bring your burdens to Him every day.
I encourage you to seek out a church where you can grow in your faith, and where you also can share your situation with others. You may find some who have been through the same situation–and even if you don't, you still will draw strength from the love and concern of others.
In addition, ask God to help you prepare for the day when your family will be reunited. Ask Him also to remove any anger or bitterness you may feel, and to fill you with His love and peace.