I remember when I was younger, I used to emotionally invest in things like no one's business. This led to be me being absolutely crushed when something didn't work out. So much so, that I didn't feel like living anymore.
I've suffered with bouts of depression for a large part of my life, and the only way I've been able to punch it in the face is going after what I really want to do in life. The days where I work towards that are when I'm at my happiest. The days I settle are comfortable at first, but late at night while I'm lying in bed, that's when the terror sinks in.
For the most part, as an adult, I find myself not truly giving any one person my heart wholeheartedly. I'll invest emotionally in new friends or low-maintenance relationships because I can turn them on and off at a moment's notice. I find it much more difficult to sustain love and happiness in the most meaningful of my relationships, which is something I'm working on. The thing is though, this is something I was only able to learn after years of figuring things out and being hit in the face with honesty. Plus, I've been fortunate enough to meet truly good friends in the past few years who've helped shape me to become a better person. But some people aren't so lucky.