Dear, when I was barely 16, I got my face busted open, just above my right eyebrow. It took 5 stitches to close it and left a scar that was deep and red for years. It has finally faded to where it isn't very noticeable nowadays, but my eyebrow was never quite right. My solutions may help with your mole.
One, cover it with makeup. Concealer, foundation, and/or Bare Minerals are all choices that may help. If that doesn't do enough to hide it, just grow bangs. There are all sorts of variations that are are trendy and very pretty. How about side-swept? Experiment with what you like and looks good on you.
Finally, don't worry so much about it. It isn't like you have a huge horn growing out of your forehead! I'm sure when people meet you, it isn't the first thing that they notice. What facial feature do you love? Pretty eyes? Draw attention to them with make-up. Do learn how to properly use make-up, however. You don't want to look like a hooker. Tons of jet-black eyeliner and mascara is not pretty, it's creepy!
The trick is to draw attention to your features, not your make-up. I want to shift focus away from my eyes (and hence the scar), so I wear rich, glossy lipstick, and keep my teeth pearly-white. I have good teeth and nice lips, so that works for me. You can also wear eye-catching earrings, or an interesting hairstyle. My hair is my absolute best feature. People, even perfect strangers, used to stop me all the time to compliment me on it. At the post office, in the grocery store, women were always asking how I got my hair so shiny and beautiful! Nobody ever asked how I got that scar.
I have never had any trouble finding guys to date, and am married. Not a one of my boyfriends (or my husband) has seemed to even notice the scar. If they did, they apparently didn't care. They tell me I'm beautiful, and I believe them. There's a lot more to me than just a scar.
You can work at having a great complexion, keep your nails manicured, and stay healthy and fit. If everything else looks great, nobody is even going to notice one little mole. Most importantly, embrace your flaws. Everybody has something they wish wasn't there (like my scar). Don't obsess and think that one little thing ruins the whole package. Be a good person, count your blessings, and get comfortable in your own skin. There is nothing more beautiful than being confident about who you are!