This is what happened to Joseph in Genesis. He interpreted the dreams for the cupbearer and the baker. And he told them when the dreams happened to remember him. He said in Genesis 40:14-15, "Only keep me in mind when it goes well with you, and please do me a kindness by mentioning me to Pharaoh, and get me out of this house. For I was in fact kidnapped from the land of Hebrews, and even here I have done nothing that they should have put me in a dungeon."
Sadly, they "forgot him." Genesis 40:23
Two years went by. And then Pharaoh had dreams that needed interpreting and Joseph was called and eventually made the head of all the land (If you don't know the story, it's a good one to read. Start in Genesis 37).
We aren't told what happened in those two years but we can believe that Joseph was faithful to God doing the tasks he was given faithfully. Like the rest of his life his faith didn't waver. He could have given up but didn't.
Those spaces of time in scripture that aren't mentioned are as important as the ones that we read. Two years of faithfulness to God. Two years of living a quiet life ("make it your ambition to lead a quiet life and attend to your own business and work with your hands" 1 Thessalonians 4:11). When God needed him God brought him out.
Years of quiet faithfulness can grow boldness in us. They aren't wasted whatsoever. For in those quiet unseen times, the times just between God and us, we can draw closer to God and develop deep, eternal roots that grow and wrap around every part of us. Each tiny space of ourselves can be overcome by God's peace and friendship and faithfulness. And then when He needs us for a special task, we will speak from that depth of faithfulness.
You are never forgotten. Never. Yes, people forgot. But God doesn't. People are like grass -- they can be cut down or wiped out in an instant. Often, the forgetfulness isn't on purpose. We all have brains and bodies that are getting older daily. Sometimes life just gets busy. There is no evil motive behind it. People are just people. But God is watching. God sees your faithfulness. He sees everything you do. And when He needs you for a special task He will pluck you from where you are at and place you where He needs you. So, stay faithful. Do not waver in the every day. Do not waver when every day seems the same. Continue to cultivate your relationship with God. It will serve you well.