Dear Future Me,
Dont worry, all things will happen if they are meant to. Stop comparing the past to the present. You left it behind for a reason, so go forward confidently in to the future you are developing right now. 
Keep smiling ... those small worries and concerns will only be forgotten in a year's time. Be grateful for each small blessing in a day. Even when it seems like things are falling apart, it takes the destruction of all the old to build the new. 
Tell the people in your life you love them. It doesn't matter how many people you have in your life - love the ones you have. Be grateful they where placed in your atmosphere and seek out the knowledge and truths you were meant to learn from them... even if it is to only learn not to be like them.