If your crush really likes you, they'll want to spend as much time with you as possible. This includes hanging out with you around friends and family, as well as wanting to spend alone time with you. See if your crush asks to hang out with you often, and if they find ways to interact with you when you're with a group of people. For example, if you're at a party and your crush asks if you want to dance or get a snack together, this could mean they like you. If your crush makes little excuses to be around you, such as to study for a test or hitch a ride to work or school, it's possible they really like you and want to spend more time with you. If your crush told their friends that they like you, the friends might act differently around you. When you're hanging out with your crush and their friends, see if the friends do things like try to embarrass your crush or say great things about them when they notice you're listening. Your crush's friends might talk up your crush in front of you to try to get you to like your crush as much as they like you. Some friends of your crush may even drop hints to you that your crush likes you, such as telling you to ask your crush to hang out just the two of you. This is another sign that they listen well and are caring. If you tell your crush you're cold, hungry, or have any other sort of need, see how they respond. If they try to help you by providing whatever it is you asked for, they're showing you that they care about making you feel better. For example, if your crush offers you a jacket when you say you're cold or brings you soup when you're sick, these are strong signs that they care about you. While it's great if your crush shows that they care about you, this isn't a guarantee that they have a crush on you as well. This includes both their personal space like their home or car, as well as their appearance. If you visit your crush and notice that they've picked up their room or took extra care to look nice, they may be trying to impress you. Your crush could clean themselves up by styling their hair, making sure they smell fresh and clean, or picking out a nice outfit. If someone really likes you, they'll want to put their best foot forward to show you they're presentable. People who like each other are often attracted to each other's personality and humor. If you tell a joke or say something funny, notice how your crush reacts. If they smile when you smile or laugh at anything funny you say, they're showing you they like your humor. If your crush smiles or laughs when you say something funny, it could mean they have a crush on you, or that they just think you're a really funny person. This includes actions like calling you funny nicknames, teasing you, or joking around with you. Each person flirts in a slightly different way, but if your crush is being playful in a way that's funny and lighthearted, they're likely trying to get your attention and show their affection. Flirting could also mean a light punch on the arm or a sarcastic comment that doesn't mean any harm. If your crush is showing off, this could be another sign they're trying to get your attention. Some people are just naturally flirtatious when talking to people, so this might be how your crush acts around everyone.

Summary: Think about whether they come up with reasons to hang out with you. Pay attention to their friends' actions when you're around. See if they're attentive to your needs. Observe if they clean themselves up for you. See if they smile and laugh at your jokes. Notice if they're playful or flirty when talking to you.

Although you might not be aware of it, your body is making mucus all the time, sometimes as much as a quart per day. Even when you are feeling perfectly fine, cells in your nose and mouth called "goblet cells" are combining water, proteins, and polysaccharides into mucus, forming its characteristic sticky texture. There is a very important reason for this: because mucus is sticky, it is able to trap irritating or dangerous particles before they reach your lungs. Without mucus, the particles of dust and dirt that you may see when you blow your nose would end up inside your body. When you are sick, your body produces more mucus to ward off the invader, be it a virus or bacteria. This is why you often only notice mucus when you are sick. Under normal circumstances, you are able to swallow mucus at the same pace that your body produces it, but under adverse circumstances, mucus is being produced faster and in greater quantities, leading the excess to clog your nose. When mucus mixes with saliva and white blood cells, it becomes phlegm. Mucus production can also be stimulated by food, environmental factors, allergens, cigarette smoke, chemicals, and perfumes. When this increased production happens, your sinuses can get blocked, leading to the buildup of bacteria and possibly a sinus infection. Many people believe that the color of your mucus reveals the kind of affliction you are dealing with. While there is some usefulness in these guides, doctors do not really use them to make diagnoses or prescribe treatments. Generally, healthy mucus should be clear. If your mucus is cloudy or white, you may have a cold. Yellow or green mucus may signal a bacterial infection. If you're trying to figure out whether you have a cold or a sinus infection, a better gauge is how long your symptoms last. With a cold, you will usually have a runny nose followed by a stuffy nose, each lasting for two or three days. Sinus infections can linger for a week or more.
Summary: Thank mucus for keeping your lungs clear. Notice your body's response. Don't put too much faith in color.