Summarize the following:
If your guy friend likes you, hanging out with you will become one of his favorite things to do. He'll want to hang out with you as much as he can and will sometimes even cancel his other plans to be able to do so. If your guy friend suddenly seems to be contacting you to see what you're up to and find out whether you're busy every day, you may be dealing with a lovesick guy pal. Guys with big crushes on their lady friends will sometimes very subtly allude to their feelings in conversation. They do this in a number of ways. Some try to steer the conversation toward romantic topics, asking questions about who their female friend likes and whether she's looking for someone. Others will want to talk about the practice of dating itself, for instance, joking about how ridiculous most couples seem to be. Keep track of the types of conversations you have with your guy friend - if they mostly seem to be about romance or dating, even if he makes no indication that he's interested in dating you specifically, this may be his way of signalling his interest. There's an obvious exception to this rule. If your guy friend involves you in his love life by asking you for advice with other girls, it's usually a sign that he thinks of you as a non-romantic friend. Some guys are less shy than others. Especially confident guys may even enjoy openly flirting with you. If your guy friend has developed a habit of playfully teasing you, making silly innuendos, or seems to enjoy scandalizing you, this shows that, at the very least, he's thought about you as more than a friend. Realize that a guy's intentions can be somewhat vague when he flirts. Many guys have a habit of flirting, then playing their flirtation off as a joke if their advances aren't immediately reciprocated. Still others flat out use flirtation and innuendo as a form of goofing off. Persistent, repeated flirtation, however, is almost always a sign of something more. Guys who wish they were dating their gal friend sometimes recreate the atmosphere of a date when they're hanging out with her. Keep an eye out for this - when you meet your guy friend for a friendly meal, does he seem a little more "formal" than usual? For instance, if he's normally vulgar and loud-mouthed, does he become quieter and more reserved? Does he develop good manners out of nowhere? Does he insist on paying for you? If so, your guy friend may be taking you on a "fake date" in an attempt to make the real thing a possibility. Also, pay attention to where he takes you and how he dresses. If he takes you to fancier, "nicer" places than you'd normally go to while hanging out and he "cleans up" his appearance, you'll know you're on a fake date. This is one of the most important things to look for when trying to figure out whether a guy friend is into you, but it's something that's often overlooked. If you think your guy friend is being especially affectionate with you, before jumping to conclusions, pay attention to the way he interacts with other girls. If he acts the same way around other girls that he does around you, you may be dealing with natural flirt or extrovert, rather than a secret admirer. Listen when your guy friend talks to you about other girls. As noted above, if he openly asks you for advice on how to attract and win over other girls, he probably doesn't see you as anything more than a friend. However, if he seems unsatisfied with other girls, complaining about how he just can't seem to find the right person, this may be his way of hinting that he's interested in you.

Summary:
See whether he makes hanging out a special priority. Pay attention to the things you talk about together. Look out for flirting. Know a "fake date" when it happens. Note how he treats other girls.