any thoughts on this message?

i happened to find this in one of my friends notebook, any thoughts onto why and how my friend would write this? and should i be worried?

"it feels weird, being back here, at school, in the very place we've made the most memory of ourselves. its haunting to an unbearable amount, uncontrollable anger and rage runs through me as I lay in the very bed we've loved so much over that year. it hurts to remember, but its something else to helplessly relive those memories that hurts me the most. now thinking about the past I've realized so much about myself, and you. I was the fool who went to heaven and hell to please the ones that I love and there's you, the one who simply did things in the up most manner that benefits you and your happiness. you were right about me, i really do set myself up for these situations. I was only an interest to you because I provided some sense of happiness for you and when you realized that you could obtain that very same happiness from someone else who were or seemed like they would have had a better chance of gaining the approval from your parents, you took it and I do not blame you, how can I? to blame someone that only wanted to be happy. through all the lies and darkness of being blind over the years, I come back to the very point that I was three years ago with the little knowledge, anger, and pain that I seemed to have accumulated over the years. on a voyage to find this false sense of happiness called "love" that I will eventually relive. now it comes to my knowledge that true happiness simply comes from your own self interest, as you've showed me. doing things that would ultimately make you happy at the end of the day is the only way to go, as you will have no regrets to any of your actions as it has brought you happiness. I regret nothing, I did what I told myself I was going to do at the start of all of this, which was to truly love you unconditionally with all my heart. I hope you find something that I didn't have so you'll be complete as I struggle with myself to get over this and continue my journey to find that very something that'll make myself complete as well.... reliving in the very same apartment, driving the same car, walking through the very same halls... helplessly reliving those memories without any consent, that's what really hurts the most."