I say, that you are defined by the bad decisions you make. The type of fucked up situations you get yourself into, defines you. It describes and uncovers your deepest, darkest and the most messed up corners of your mind. That's my definition of "growing up". Learning what NOT to do. That is how you learned how to walk, right? Or to ride the bike? Failing a million times before you finally figure out the RIGHT way to do it? The same principle applies for sexual situations too. Failing a million times, okay, not a million.
Money, cars, gadgets etcetera, hold no value in the long run. The ONLY thing that a person can truly give to someone is, time. Because that's one thing that we all know that we are running out of. That's how you show affection, you give them your time and you expect the same in return. What happens when they misuse your time, or waste it? Or give it to someone else? Someone who doesn't deserve it. What do you do then?
Do you waste more time on them by crying, or displaying your fury? Which by the way is a really pointless thing to do because they have already wasted your time without flinching. They didn't value it. They did not value you. It is one of the most messed up feelings in the world.
What you are supposed to do then is, treat it like another bad choice. A bad decision. Learning what NOT to do and moving on.
That's how you learn how to walk.