Hold on

You don't have everything forever. As much as you wish you could or think you can, in truth you can't. You only have the time you had because after that they are just memories. You don't want those memories to ever leave you, you want them to stay. I hold on to all my memories; think about them in my spare time, when I go to sleep or whenever I need so I don't forget them. It may sound like a boring thing to do but when someone else remembers that memory and you don't, it does put a hole inside of you. They remember the time or times you had and you don't. 

My advice for you: if you make a memory - they are all worth remembering - think about it whenever you can. They can make you happy or they can make you sad but that memory may be all you have one day, so don't let it go.