I Need Some Advice

You know how you get things, and they are pretty important to you? Then, you know how when you have those things, people automatically want to use them ALL THE TIME!! So, you let them use it once, and they automatically think they can use it over and over again. It is so annoying, and it may not be a big deal, but you usually want your stuff to stay nice. I'm not saying that when I let people borrow my stuff they don't care for it, but you know how when things are your, you care for them more than other people do. I am having this problem, and I need some advice on what to do. I don't want to sound mean or selfish, but you know how there are some things of yours you just don't want other people using, or at least using all the time. I just need help on what to say and how to say it because I don't want to hurt anyone's feelings, but I want them also to know that they need to respect me by not always using my stuff, when they do or don't ask to use it. Please Help Guys by letting me know what you think!!