Thinking and Self Reflection

Life was a lot easier when I was younger. Situations were easier to deal with. Concepts were simple and easier to understand. A lot of people knew more than enough about me, I had people who knew me. I've always been too hung up on the past, fully understanding that things would never be the same. I'd spend countless hours thinking about it, wondering how things would have turned out if I didn't take various paths that I had chosen to take. For the most part, I imagined they would have turned out better.
I think the most changed happened in my freshman year of college, I entered this new world with a fifteen year old body. My biggest fear was to not been taken seriously because I was younger than everyone else , so I rebelled. Now that I look back , I should have just let my fifteen year old self be who she was. I can barely understand what goes on in my head anymore. So I'm using this moment in this dark, noiseless living room with no other source of light but my laptop screen to further understand me, myself and my mind. This is my first self reflection i'm really not sure if i'm doing it right but here goes
Would I do it all over again if I could ? I know I'm supposed to say no but Yes, yes I would. But since I can't where do I go from here ?
Don't waste time with relationships you see no future in
Quickly made relationships should rarely be relied on
Attention from the male species is unnecessary, they bring you babies and emotional wreckage.
Fake friends are easy to spot. Trust your instincts. Please, please open your eyes.The end result can hurt really bad.
Be nicer to people, even those that did you wrong (some of them ) give a smile, try your best. It warms your heart.
Try to put an effort in creating and maintaining your friendships, but not too much effort. Those that require a lot would usually never be worth it.
Don't be afraid to let go of people holding you down , but don't let people go so hastily.
Try and open up to people, break out of your comfort zone. Socialize
Friends come and most especially they go, don't be too hard on yourself when dealing with it .
When being shown love , don't push it away ,at least try to acknowledge it.
Don't ever feel unworthy, don't speculate on people's true intentions too much, they are mostly not meant to be discovered.
Don't over-think things, enjoy life's simplicity
Sleep peacefully.