Awwww sincerly your experiences really cut to the heart and i know what it means for someone's dreams to be thwarted coupled with a great sense of loss.From the way you sound,you seem to always keep it alone or hardly go for a walk and check on friends due to your tight schedule.Studies have proven that in ur leisure time, ways to repel anxiety,depression and sadness are; taking a walk for sight-seeing,going to sports centres to watch sports,involving in a social gathering(women group,the choir in the church,voluntary organizations etc).Coming to a beautiful life.we are meant to live a beautiful life here on earth before heading to eternity for more beautiful one.In Jeremiah 29:11.God says He has a good plan for us and He's able to give us expected end,yet this doesn't mean that life is nw a bed of roses.Inasmuchas we are still in this world, many are the afflictions of the righteous but God delivers us from all.Therefore the level our spirituality and as well as our committment to God will certainly land us a beautiful life here.There are Satanic unseen forces fighting us and wouldn't want us enjoy the good life and when we fall victims to this, due to lack of constant spiritual warfare and committment to God,it will nw seem as if God's promise hardly comes by.At your age there alot of things u can accomplish and i'm believing that God will renew ur srenght.Serving people is rewarding and pls take it easy and worry less.Pls dnt give Satan chance by much sadness and anxiety which can lead to a severe illment.Be joyful in the Lord,appreciate ur life and ignore ur problems