Are one night stands more prevalent now? I'd have to say yes because of the anonymity and simplicity of the hook up. It's like a transaction rather than a date where two people move toward sex. With the hook-up it predetermined. I guess the whole thing with hooking-up is that it seems too easy.
Look at yourself. Who are you? What makes you who you are? What life lessons did you learn and absorb into your soul as a child? Do you have compassion? empathy? or perhaps an extraordinary gift of listening and learning?
Anger is very destructive and like Bryan points out, it can lead down a long and dangerous road to depression, isolation, and distress. Recognizing your anger and how you feel is the first step and dealing with it is the next.