People hide from things like their fears and responsibilities, maybe adulthood as a general concept. so the song says send your dreams where nobody hides. send your dreams, your hopes, yourself mentally away from a place where you need to hide from the bad things. send yourself to a place of freedom and serenity and peace. Give your tears to the tide, to me, means let it go and accept and move on the way the tide flows and continues. There is no time in this world to waste, aim for your dreams, let your sadness and anger go. There is no end there is no goodbye, means you will never be alone even when your loved ones no longer walk the earth with you. you will see them again. no time to be sad. Also, there is no end could mean there is no end to the love you can give and the abilities you have, keep dreaming. Disappear with the night. let things flow, be yourself, go out and do what you love, not worrying about the consequences or the judgment. love all you can. no time to waste.
to me this song is about inspiration and motivation and holding on and regaining the mind set you once had to aspire to be great.

Good luck to you in all of your lives, you can do this.