help me how to do it...

I used to relate myself to a song "everybody`s changing",
'So little time Try to understand that I'm Trying to make a move to stay in the game I try to stay awake and remember my name But everybody's changing And I don't feel the same'
so true, coz i really don`t feel like changing, until a friend of mine, told me to stop and love myself, if i want to be happy...
Honestly, I don’t know how to start it, but I have to, it’s exactly a year since that feeling captured me... I will never ever forget that, but I think that’s the only way to move on and start, I have to forget every single thing, It seems like, I’m the only person who can’t move on,..
I always give myself an excuse and consideration that it’s hard to go on and forget, but it’s not, it’s just that I don’t want to...
I know I’m acting like a fool every time I remember what happened and still get affected by him...
So much of him, I have to concentrate to myself,.. I’m saying this and I have to do it, I have to it, I have to do it...
I don’t know how, but I have to...
I need to concentrate to my work, friends and self...
I have to love myself from now on, not anyone else, not him...