Young men are adventurous and full of energy, which is why you may be attracted to them in the first place.
Show him that you can keep up with him by surprising him with creative and interesting dates. Go rock climbing together or bungee jumping. If dangerous thrills are not your thing, be spontaneous. If you had plans to watch a movie at your house, surprise him by taking him out somewhere special or by wearing something enticing against a candle-lit background.
Don't Treat Him Like A Child
The quickest way to turn your younger guy off is to act like his mother.
He's an adult; let him make some mistakes. For instance, even if you know it's a bad idea to get wasted at his friend's birthday party when he needs to be at work bright and early the next morning, bite your tongue or find a way to casually warn him without being overbearing. You could simply say, "Don't forget you've got that meeting in the morning," and leave it at that. Try not to make all the decisions in the relationship. If he wants to take you to that action-packed movie that his age group is raving about, let him take you and watch it with an open mind. In turn, you can open his mind to more mature things as well.
Let Him Pay
Don't get swindled into paying for every meal or activity you do because you make more money or are more established.
If he wants to be the man and pay, let him pay. If the two of you have been dating a while, do what other couples do and take turns covering the meal. If you consistently pay when you go out, he may begin to feel that you think he can't take care of you, or he may allow you to begin taking care of him and take advantage of you.
Make Him Wait
Some younger men like the novelty of sleeping with an older woman and only want to use you solely for those purposes.
Don't let someone turn you into a conquest. If the guy is calling you often in the evenings to come over or is constantly asking you what you can teach him in bed, get rid of him unless that's all you want out of the relationship too. But if you're looking for a solid, meaningful and potentially long-term relationship, wait until you really get to know him better before sleeping with him. Take the time to gauge his maturity and allow him to earn your trust. Any man who is really interested in you will wait and be eager to show you that they are genuine.