God hasn't forgotten you, in spite of what you think. He knows all about you -- your loneliness, your yearning for love, your disappointments, your hurts. More than that, He knows what is best for you.
How do I know He hasn't forgotten you? One reason is because He has kept you from going down the wrong path during these last 15 years. Elsewhere in your letter, you write about some of the men you hoped would be your next husband -- and in every case you realized later that they wouldn't have been right for you. At the time, you were disappointed (and even angry at God) -- but God was watching out for you, sparing you from even greater disappointment and misery.
My prayer is that you will come to realize just how much God loves you, and will respond to His love by turning to Jesus Christ and asking Him to be the center of your life. God loves you -- and the proof is that He was willing to send His only Son into the world to die for your sins. The Bible says, "This is love: not that we loved God, but that he loved us and sent his Son as an atoning sacrifice for our sins" (1 John 4:10).
In addition, don't keep trying to impose your will on God, but seek His will for your future. If it is His will for you to remarry, trust Him to guide you to someone who loves Christ and is living for Him.