In response to:
First off, My name is Joe, I am a 23 year old Police Officer who loves to have an Angel in my life to cherish. Well I met a girl that I began to fall in love with, right. Well two days ago, I was reassigned to unmarked/plainclothes detail in the city.

Well I was posted up at one of our local hotels to catch a burglar that has been terrorizing out city. Well we did not find him, BUT we found my girlfriend cheating on me in the parking lot. I really cant talk about it with my coworkers, you know the tough cop thing. I just don’t get it, I did everything right, I am romantic. I send flowers, I do candle light dinner and stuff like walks on the beach. It seems like the guys who cheat and treat there girls like crap the woman cant get enough of them. Well, I can’t seem to find a faithful woman. Is there such thing as a faithful woman?

Hey Joe,
Yer still young, so you have much to learn, and lots of time to learn it in.
We tend to put women on pedesatals ( sp? ), and find that alot of them are less deserving of that then the guys that dropped them the first time.
There's no right or wrong. No one wants to be alone, so we do what we can to lure a possible partner, to learn if that one is the right one for us or not. Some are lucky and pick right the first time, some, like myself, take many and many takes to get it right. Me? I STILL haven't gotten it right. That's pretty much the reason why so many singles websites are doing so well and are so well popluated.
All you can do is keep trying, and not lose hope. Ain't easy mind you, as I can tell you from experience that sometimes it's just easier to give up. But, to give up is to be alone and lonely. So, we pick ourselves up and we forge on.... and on...... and on...... ad naseum.
Let her go, focus on something else for a while... and then go back to finding someone else for you.
I wish you luck, as you, like the rest of us really need it.