You're always getting these random texts about this silly thing that happened during breakfast or how he saw something and thought of you. When someone is into you, they always find an excuse to get in touch. Even if it's just a short text.
There are no grand gestures here. It's more about the little things. Like getting you a brownie after you finish a big test or taking you to the spot your grandfather used to take you as a kid. These kinds of gestures prove that the person is listening closely.
...Among their friends. It's because the person has been talking about you or at least, talking around you enough that the friends have figured out the person has a huge crush on you. Yep, you're popular and you don't even know it.
A person who's into you enjoys seeing you laugh. They love the idea of keeping you entertained. When that happens, then they've grabbed your attention and more importantly, made you happy which is what they want to see.
You can feel it. You can sense it in your bones. You know that there's something electric between you, even if you've never even held hands. And you can see that the other person feels this sense of excitement too.
Nothing too obvious. These are more subtle compliments like saying that they like how you played the piano or liked your new jeans. Nothing that screams "I want you." More like "I really care about you."
And finally, that person becomes your number one supporter. Whether you're struggling because of exams, work or family, that person is there to listen and encourage you. They're the first ones to ask you how you're doing and allow you to vent about whatever it is that's bothering you.