@Heart_Melody, I can't help myself, I cried a bit when I read your post, I was feeling the same thing for several years, But God led me into realization that what matters in this life is what we do for Christ. I was so focused on my own feelings and I felt that no one cares, nobody's there for me, or that I don't matter at all, but you see we all matter to God, even if I feel so insignificant most of the time, God is always with me, even if I feel all alone in this world. There were times that I don't even want to wake up and face the day but God helped me understand that
he is the reason we live, I get up to live for him, If I focus on living for myself I would only end up in disappointment because as human I know I am not content with what life has to offer, If I focus on what I feel I would only end up being depressed and sad and lonely, I used to think that this life is for us to be happy and be merry, but actually it is not, it is for Christ, not that we are not allowed to be happy, we can, with Christ we can, and that is what God intends and wills for us, "I have come that they may have life, and have it to the full." John10:10.
I know that being with God in heaven is our ultimate goal but while we are still on earth we can live for Christ, enjoy his presence, his words, his marvelous creation and cherish the life he has given us. People he gave us to share life with, To live for him, with him and by the power of his spirit that is working in us. God Loves you more than you will ever know. That is the truth and we are here for you. You are not alone, do not let the Devil steal your will to live.